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Installing H4 Headlamps
 
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Pelican Technical Article:

Installing H4 Headlamps

Thomas C. Gould, III

Talent:

*

Applicable Models:

 
Porsche 911 (1965-89)
Porsche 912 (1965-69)
Porsche 914 (1970-76)
Porsche 930 Turbo (1976-89)

One of the easiest and best upgrades you can do to your Porsche is the installation of better headlights. The stock USA spec lights that came with the cars are less than adequate for nighttime driving. Installation of European spec H4 lights will give you the ability to drive your car with confidence at night.  Installing H4 lights in your Porsche is an easy procedure which can be accomplished in a short amount of time with just a couple of screwdrivers.

Installation on the 914:

Note to 914 owners: We currently don't have installation photos for the 914, but the procedure is very similar.

The first step is to turn your ignition and headlights on, then turn the ignition off.  This should leave the headlights in the raised position. To prevent the headlight assembly from accidentally lowering, disconnect the ground strap from the battery, or remove the headlight relay that powers each of the headlight motors. You do not want the headlight to lower itself while you have your hands in there!!!   There is a lot of leverage within the motor mechanism, and the result is a force that can easily break a few of your fingers.

Next, remove the plastic headlight surround shroud from the headlight assembly by removing the three Phillips head screws.

Now remove the three small screws holding the chrome headlight retainer (see fig.5). These three screws tend to strip easily, so you may want to spray them with WD-40 first, and make sure you have a good grip on them before trying to turn the screw. Once these three screws come out you can remove the headlight from the assembly, as shown in Figure 6. Remove the electrical plug from the back of the existing headlight, as shown in Figure 12.

To install the new H4 headlight: slide the old chrome retainer ring over the new headlight. Note that the retainer goes on one way only! If it is not installed correctly, the mounting screws will not line up.  Make sure that the bulb is installed in the assembly (Figure 10 and Figure 11) Plug the headlight electrical plug into the back of the headlight assembly (Figure 12), and then install the headlight and the chrome retainer with its' three mounting screws (Figure 5).

Reinstall the plastic headlight surround shroud and you are done! Reconnect your battery (or reinstall your headlight motor relays) and see if the lights work. Test to make sure both the low and high beams are working!

You will probably want to adjust your headlights after installing them.

Installation on the 911 (1969-83):

To install a Hella H4 replacement headlight (or any other standard replacement headlight):

[If you are replacing the entire headlight assembly with the Bosch H4 unit, see the separate instructions below].

Remove the screw at the bottom of the headlight ring (Figure 2 and Figure 3). Be careful when you remove this screw that the screwdriver doesn't slip off and scratch your paint! Also note the angle at which this screw is installed. When reinstalling it you need to install it the same way. Once the screw is out you can lift the ring off the fender (Figure 4). If it doesn't come right off, you may need to slightly twist the ring to loosen it up. Once it is off, check the rubber seal around the headlight opening in the fender. Now is a good time to replace it if it is worn or broken.

Next remove the three small screws holding the chrome headlight retainer (Figure 5). These three screws tend to strip easily, so you may want to spray them with WD-40 first, and make sure you have a good grip on them before trying to turn the screw. Once these three screws come out you can remove the headlight from the assembly (Figure 6).  Figure 7 shows the headlamp removed.  Remove the electrical plug from the back of the existing headlight (Figure 12).

To install the new H4 headlight: slide the old chrome retainer ring over the new headlight. Note that the retainer goes on one way only! If it is not on correctly, the mounting screws will not line up. Plug the headlight electrical plug into the back of the headlight assembly (Figure 12), and then install the headlight and the chrome retainer with its' three mounting screws. You can then test the headlight at this time to make sure it works.

Install the new rubber seal around the headlight opening on the fender, or make sure the old one is seated correctly. Install the headlight ring. Note that the ring fits over the lip on top of the fender opening, and then the screw at the bottom gets installed (Figure 13). Did you remember to note the angle of the headlight rim screw? It is sometimes hard to get it started correctly (Figure 14). Once again be careful not to let the screwdriver slip off and scratch your paint!

That's it! You will want to check the adjustment of your headlights after they are installed (Figure 15).

To replace your existing headlight assembly with the Bosch H4 headlight assembly:

Remove the screw at the bottom of the headlight ring (Figure 2 and Figure 3).  Be careful when you remove this screw that the screwdriver doesn't slip off and scratch your paint!  Also note the angle at which this screw is installed. When reinstalling it you need to install it the same way. Once the screw is out you can lift the ring off the fender (Figure 4). If it doesn't come right off you may need to slightly twist the ring to loosen it up. Once it is off, check the rubber seal around the headlight opening in the fender. Now is a good time to replace it if it is worn or broken.

Next remove the three small screws holding the chrome headlight retainer (Figure 5). These three screws tend to strip easily, so you may want to spray them with WD-40 first, and make sure you have a good grip on them before trying to turn the screw. Once these three screws come out you can remove the headlight from the assembly (Figure 6). Remove the electrical plug from the back of the existing headlight (Figure 12).

Since you are replacing the entire headlight assembly, you will need to remove the four screws that hold the headlight retainer and remove the entire assembly from the headlight bucket (Figure 8 and Figure 9).

Install the new rubber seal around the headlight opening on the fender, or make sure the old one is seated correctly.

Connect the plug to the back of the new headlight assembly (Figure 12), and then install the new assembly in the headlight bucket. Note that the headlight ring fits over the lip on the top of the fender opening, and then the screw at the bottom gets installed (Figure 13 and Figure 14). Did you remember to note the angle of the headlight rim screw? It is sometimes hard to get it started correctly. Once again, be careful not to let the screwdriver slip off and scratch your paint!

Test your headlights and readjust them if necessary.

Installing H4 replacement headlights in a 65-68 911:

Note: We don't have any photos for this procedure. Remove the headlight assembly retaining screw at the bottom of the headlight assembly. Be careful not to let your screwdriver slip and scratch your paint!

Lift the assembly away from the car and unplug the light bulb connection from the back of the unit.

Remove the old headlight from the back of the headlamp assembly. The headlight is held in place with 4 spring clips – note carefully how these are installed! Carefully remove the spring clips (wear eye protection – these clips can really fly!), and then remove the old headlight. Place the new headlight in the retainer and install the spring clips (again, be careful!).

Plug in the headlight electrical connector and reinstall the headlight assembly. Be careful installing the lower screw so as not to scratch your paint.

Test your lights to see if they work, and adjust them if necessary.

Well, that's about it. If you have any questions or comments about this technical article, please drop us a line.   Please also remember that without your continued purchases of parts through Pelican Parts, the expansion of this site cannot continue.  We offer good prices and great customer support.  We sell all the headlamp packages featured in this article at very competitive prices!  If you need anything for your car, please don't hesitate to give us a try by calling toll-free, 1-888-280-7799, or by emailing us. Also, be sure to check out our on-line catalog, with over 2000 parts!

Figure 1

Stock Headlamp Assembly

Figure 2

Headlamp Retaining Screw

Figure 3

Removing Headlamp Rim

Figure 4

Removing Headlamp Rim

Figure 5

Removing Headlamp from Retainer

Figure 6

Removing Headlamp from Retainer

Figure 7

Headlamp Removed

Figure 8

Removing Retainer with Headlamp

Figure 9

Removing Headlamp and Retainer

Figure 10

Installing H4 Bulb

Figure 11

Rear of 911 H4 Lamp Assembly

Figure 12

Plugging in New Lamp

Figure 13

Installing 911 H4 Headlamp Rim

Figure 14

Installing the H4 Assembly

Figure 15

Installed 911 H4 Headlamp

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Comments and Suggestions:
Tom Comments: Hi! I have an US 930 Turbo 1987 with the Bosch US headlights still. Do I need to replace the whole assembly to get the H4 or just the lenses would work? Thanks!
November 16, 2016
  Followup from the Pelican Staff: The whole headlamp. http://www.pelicanparts.com/cgi-bin/supertech/catalog.cgi?action=frameset&return-url=/cgi-bin/supertech/catalog.cgi%3Faction%3Dframeback%26page%3D956&catalog-url=http%3A%2F%2Fwww.pelicanparts.com%2Fcatalog%2FSuperCat%2F0814%2FPOR_0814_ELLITE_pg4.htm %3Futm_source%3DSuperTech%23item13


- Nick at Pelican Parts
 
Debbie Comments: Can you tell me how to remove the plug and grey round plug on the back of the Bosche headlamp so that the interior glass can be cleaned?
November 11, 2016
  Followup from the Pelican Staff: You can try unscrewing it 45° counterclockwise. But it may not be removable. - Nick at Pelican Parts  
Frank Comments: I have a 1989 Carrera Targa. My headlamps are Bosch but don't say "H5" or anything close to that on them. One of my headlamps is cloudy on the inside and the other is clear. Can my headlamps be disassembled to clean the inside of the glass? Or must it be replaced as a unit?

Also, I've seen reference to a "9004" bulb as being compatible with my car. Does that even work in my car? What kind of upgrade would you recommend for a 1989 Carrera Targa to get the brightest light possible, short of something major like rewiring the entire system?
January 12, 2015
  Followup from the Pelican Staff: I find cloudy headlights require replacing.

Give our parts specialists a call at 1-888-280-7799 and they can help figure out which part or repair kit you need.
- Nick at Pelican Parts
 
Heinz Comments: What is the correct way to adjust the headlights on an 85 911?
September 25, 2014
  Followup from the Pelican Staff: See this thread:

http://forums.pelicanparts.com/porsche-911-technical-forum/572703-headlight-adjustment-1987-carrera.html - Nick at Pelican Parts
 
Jack Comments: My car is a 1988 Carrera CE with H4 headlamps. The left high
beam is out. I'm having difficulty removing the unit from
the fender. I have removed the outer ring, no problem, but
I see no mounting hardware for the bucket, and I fear trying
to force the bucket out of the fender well. Please help.
March 15, 2014
  Followup from the Pelican Staff: I attached a photo of the screw location. If your doe snot have this, look at other areas around the bucket. - Nick at Pelican Parts
Tkmoore Comments: Quick question. Doing the H4 upgrade on my 83 SC and happen to have access to some already painted Outer bezel rings from a 1988 H5 setup. Are the outer bezel rings interchangabe between H4 and H5 lenses?
Thanks, Tim
January 25, 2014
  Followup from the Pelican Staff: I am not 100% sure. I opened a post in our forums. A Pelican community member may be able to answer your question.
- Nick at Pelican Parts
 
JayAre Comments: Well - mounting the Bosch H4 assembly can be challenging!

'79 911SC - the H4 cinched down and sealed when the mounting screw tightens up; feels like you're stripping the screw or the welded in nut - but, it works. The Bosch unit ships with a rubber spacer to hold the screw in place - which I removed. Thus you can shine a flashlight into the hole and line-up the assembly before you insert the screw and tighten. It does work though...

By the way - not sure if this was referenced earlier - the cowling around the H4 comes in either flat-black or chrome. You should paint the cowlings to match the car color before assembly chrome was stock before 1975 models.

Finally - the parking lamp referenced by Neel below is a cool touch and as simple as he noted. Be careful you don't tap in to the turn signal wire!
August 27, 2013
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
 
Yann Comments: Hi ! I have exactly the same problem as JOE : "Comments: HELP !!!!! Thank you for all the comments on here, it has helped me some but my problem is, I am trying to install my H4s headlapms but cannot get the outer ring to mount flush around the entire black ring seal, it is not flushed against seal. It almos seems like it is 1mm or less smaller than needed, it should of been an easy 15 min swap from H4 to H4s. What a nightmare, any suggestions please???? I am installing it by hooking the top lip first then trying to seated flush all the way around prior to installation screw at the bottom. Thx so much ! Joseph "
Can see any suggestion about a solution...
I don't know if Joe get the solution... could someone help me??
Thx !
Yann
May 31, 2013
  Followup from the Pelican Staff: I would suggest placing the ring on before installing any screws. Trying to place the ring on at an angle is a pain.

Here are three helpful threads:

http://forums.pelicanparts.com/porsche-911-technical-forum/148621-h4s-headlight-install-pic.html

http://forums.pelicanparts.com/porsche-911-technical-forum/148621-h4s-headlight-install-pic.html

http://forums.pelicanparts.com/porsche-911-technical-forum/148621-h4s-headlight-install-pic.html - Nick at Pelican Parts
 
Colin Comments: I have shipped over from the UK my rhd 1983 SC with H4s, can they be adjusted to be legal in Canada or do I have to change the lense or the complete headlamp?
Hope ypu can help
May 26, 2013
  Followup from the Pelican Staff: I am not familiar with Canadian inspections rules. I would check with a local inspection facility. - Nick at Pelican Parts  
RickB Comments: "Now remove the three small screws holding the chrome headlight retainer see fig.5."

As referenced, mine are stripped but I don't see an obvious replacement part if there is one. Suggestions?
March 17, 2013
  Followup from the Pelican Staff: Is just the screw stripped or the bracket the screw goes into? - Nick at Pelican Parts  
Joe Comments: HELP !!!!! Thank you for all the comments on here, it has helped me some but my problem is, I am trying to install my H4s headlapms but cannot get the outer ring to mount flush around the entire black ring seal, it is not flushed against seal. It almos seems like it is 1mm or less smaller than needed, it should of been an easy 15 min swap from H4 to H4s. What a nightmare, any suggestions please???? I am installing it by hooking the top lip first then trying to seated flush all the way around prior to installation screw at the bottom. Thx so much ! Joseph
March 15, 2013
  Followup from the Pelican Staff: I would suggest placing the ring on before installing any screws. Trying to place the ring on at an angle is a pain.

Here are three helpful threads:

http://forums.pelicanparts.com/porsche-911-technical-forum/148621-h4s-headlight-install-pic.html

http://forums.pelicanparts.com/porsche-911-technical-forum/148621-h4s-headlight-install-pic.html

http://forums.pelicanparts.com/porsche-911-technical-forum/148621-h4s-headlight-install-pic.html

- Nick at Pelican Parts
 
haasman Comments: Is there written instructions for aiming these lights?

Haasman
November 1, 2012
  Followup from the Pelican Staff: We don't currently a tech article for that procedure. - Nick at Pelican Parts  
J Comments: Hello,

I also have a US spec 1987 Targa, what do I need to convert to the H4 lights...

What lights do I have now, picture attached

Thanks,
J
October 22, 2012
  Followup from the Pelican Staff: The H4 upgrade kit is here:

http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_ELlite_pg1.htm #item4 - Nick at Pelican Parts
 
King Comments: Can I replace just the lenses that have formed a white opaque substance on the inner lens with the new Euro lenses on my 1989 C4? Is so, how do I separate the lens from the reflector housing without chipping or breaking the lens or damage to the housing? The lenses listed are 40.00 each!
October 8, 2012
  Followup from the Pelican Staff: i attached a photo of the part you need to replace.

http://www.pelicanparts.com/catalog/shopcart/911L/POR_911L_ELlite_pg1.htm - Nick at Pelican Parts
robofc Comments: The reason I would update 964 from H5 to H4 is because the only way to gett low and high beam bi-zenon HID lights is with the H4, not the H5.
April 8, 2012
  Followup from the Pelican Staff: Thanks for the Info. We appreciate it.
- Nick at Pelican Parts
 
bill Comments: I have hella h4's on my 1976 912e. I have no low beams, only high beams. the lights go out when I switch to low. I have opened the switch and made sure it is operating properly. Does the entire lamp get replaced or just the bulb. Is it likeley that both low's would be out?
February 21, 2012
  Followup from the Pelican Staff: It is a sealed beam, you will have to replace the lens with bulbs. - Nick at Pelican Parts  
Don Comments: I have an '88 Carrera Cabriolet in Venetian Blue. My headlights are the H4 European assembly, and the current ring is also Venetian Blue. If I upgrade to the new H4 Halogen, can I use the Venetian Blue ring, or must I use the chrome?
Thank you for your help.
DLS
November 5, 2011
  Followup from the Pelican Staff: I think your rings will work. I know the older ones had to be replaced. Like in this article:

http://www.pelicanparts.com/techarticles/mult_h4_headlamps/mult_h4_headlamps.htm - Nick at Pelican Parts
 
Jimbo Comments: I would like to adapt my American delivered 1985 Cabriolet headlights to the Euro style. The car is presently right hand drive and is in Australia. Will the H4 lights bolt straight in and what will I need to complete the job.
September 21, 2011
  Followup from the Pelican Staff: You'll need the kit here:

http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_ELlite_pg1.htm #item4 - Nick at Pelican Parts
 
Oliver Comments: 1977 911 S
Wayne, a very basic question: Is there a "right" and "left" version of the H4 that you need to be aware of when ordering ? I have bought 2 boxes at a dealership in Germany that do not indicate "left" or "right" at the label but I thought there should be a difference as a they they should have a different beam characteristic which - too right - might be adjusted whithin but b the 2 screws through the rim should be symmetrical after installation .... Which in my case the're not as they're both "bottom left" and "top right".

Many thanks,
Oliver
September 16, 2011
  Followup from the Pelican Staff: There is not a left or right specific one. They are the same. - Nick at Pelican Parts  
mr b Comments: Hi, could you give me a price of an H4 headlight, regards Brian
August 20, 2011
  Followup from the Pelican Staff: Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
arfa Comments: are the h4 headlamps compatible for a 1971 911 targa left hand drive imported to use in the uk and do i need any outher parts to go with the conversion .
June 18, 2011
  Followup from the Pelican Staff: I think this kit will work with your vehicle:

http://www.pelicanparts.com/catalog/shopcart/911E/POR_911E_ELlite_pg1.htm #item0

To be sure, give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
PacificP Comments: i have a 74 targa 911 and have the upgrade to h4s but still have sugar scoops, how do i get rid of the sugar scoops and switch to the euro look, is there an outer cover lens and ring that will make the us spec light look like the euro light?
June 8, 2011
  Followup from the Pelican Staff: Check this page for the parts you are looking for:

http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_ELlite_pg1.htm #item4 - Nick at Pelican Parts
 
John D. Comments: Mike, I also had a cloudy reflector on my '87 lights. I first removed the lights and bulb. I then added a quantity of Windex glass cleaner into the assembly. Using a flexible plastic stick, I wrapped the end of it with soft paper towel and carefully wiped the reflector with the Windex. It restores the shine on the reflector and lens very nicely.
May 28, 2011
  Followup from the Pelican Staff: Thanks for the input on this one. We appreciate the help.
- Nick at Pelican Parts
 
Mike Comments: I have H5's in a 1987 911 Carrera. I would like to clean the inside if the lens, which is cloudy. It appears to be sealed to the reflector. Any suggestions?
May 25, 2011
  Followup from the Pelican Staff: Here is John D's tip

Mike, I also had a cloudy reflector on my '87 lights. I first removed the lights and bulb. I then added a quantity of Windex glass cleaner into the assembly. Using a flexible plastic stick, I wrapped the end of it with soft paper towel and carefully wiped the reflector with the Windex. It restores the shine on the reflector and lens very nicely.
- Nick at Pelican Parts
 
Jim Comments: I have a 91 964 C2 and want to upgrade to H4 lamps. Can I re-use my painted headlamp cover ring, painted to match car, instead of chrome or primer in kits? Can I use a brighter bulb, like 31425-m97. New seals, bulb, lens and I'm in business right?
March 24, 2011
  Followup from the Pelican Staff: Your car originally came with H5 lamps, which are just as good as the H4 assemblies I think you're referring to. The standard H4 lamps that you find on the early cars are not easily compatible with the later models. - Wayne at Pelican Parts  
Teej Comments: 1979 Porsche 911SC:
Burned out bulb drivers side H4 system removed the screw at "6:00" without trouble, tried to remove the other screw holding the chrome retainer ring and the just spin without backing out... I see no way to the back of this assembly... any suggestions would be greatly appreciated
November 22, 2010
  Followup from the Pelican Staff: That nut is welded on the opposite side. The only access is a small drain hole in the bottom of the headlamp bucket and/or the hole for the plug. I'm guessing you'll have to grind away the head of the bolt and then tap it into the headlamp bucket. You will probably need a new ring too after that unfortunately. - Wayne at Pelican Parts  
realcasual Comments: This question is about driving lights on a 1974 Porsche 914. I'm in the process of dismantleing most of my car in preparation for it being soda blasted. I've found no way into the back of the driving lights, and as a result can't figure out how to remove them. I've removed one of the lenses and found that there is no nut or bolt on the interior of the light shell. So I started to spin it to unscrew it. It worked for a while, and got looser but not just spins without coming off. I'd really appreciate it if you could give me guidance on the removal of these lights. I don't care what I have to do to get them off since I plan to replace them with other lights.

Thanks
August 15, 2010
  Followup from the Pelican Staff: I don't have my car here with me, but I believe that there is a mounting bracked that is welded into the chassis that is located behind the bumper. - Wayne at Pelican Parts  
fryardds Comments: Hello,
Is it possible to replace an H5 assembly in a 964 with an H4 assembly? If so is there a wiring adapter that is needed for the conversion? If so does Pelican sell the adapter? Thanks.
May 9, 2010
  Followup from the Pelican Staff: I believe that you can do that, and do need an adapter. But I'm not sure why you would want to - the H5s are just as good as the H4s and basically look the same as well.

Unless you mean update an H5 with an older-style lamp like the one shown here in this article? Interesting idea, I haven't seen anyone do that? I thought you meant the complete H4 European assemblies (like the ones used on the 1973 Carrera RS). - Wayne at Pelican Parts
 
Neel Comments: Reference has been made to the "small bulb" in the H4 assembly.. I made it functional with the parking lights very easily.. On my car, an '81SC, after you remove the old headlight assembly, I found a blk/w stripe wire in the cavity that is powered only when the parking lights are on.. I sliced into that wire using a scotch-loc connecter. Adding a short piece of 16ga wire with a female spade connecter to plug into the center terminal of the small bulb.. I did the same with the ground side.. I spliced into the brn wire from the headlight harness and connected it to ground side of the small bulb. I did this years ago on my '70T also.. If I remember correctly, the wiring was a bit different, but the result was the same.. Make sure you check the wiring on your application as it may be different from mine.. Double check your work and you're done.. I used connecters and wire I had laying around, but if you have to buy the stuff, the cost should be less than $5.00. With the headlight assembly out, it took me all of about 10 minutes to do..
Also, IMO replace your headlight gaskets when do this install.. Why spend the $$$ on the the H4 conversion and skimp here? Buy them with your lights from Pelican and there is no additional shipping!! I treated the new gaskets with Vinylex.. Make sure you put the seam where the gasket is put together at the bottom of the bucket.. That way if it does split later on, it will be totally unnoticeable and have minimal effect on function.
December 2, 2009
  Followup from the Pelican Staff: Thanks for the very useful additional info! - Wayne at Pelican Parts  
colegill Comments: I would like to use the 80/100 watt bulbs. I realize that i will need to use the upgrade relay. Do i just replace the stock unit? or is there re-wiring required. 83SC, Hella H4 Headlamps.
July 30, 2009
  Followup from the Pelican Staff: You need to run a wire from the battery directly to the movable contacts of the relay. Then, you need to attach the coil of the relay to the supply voltage for the lights. There's a photo of this in one of my books, see here: http://www.pelicanparts.com/bmw/techarticles/101-Projects-93-HID/Pic2-01.jpg - Wayne at Pelican Parts  
jonny Comments: "Install the new rubber seal around the headlight opening on the fender, or make sure the old one is seated correctly."
Could you provide a sectional view through the whole assembly showing the correct seating for the seal.
On installation I can still see metal around the rim!
July 28, 2009
  Followup from the Pelican Staff: Easy - just put the seal in-between the chrome ring and the fender. Be careful installing these seals - if you stretch them the little glued part will break. - Wayne at Pelican Parts  
Lee Comments: According to your book, "All 911s through 1989 can use H4 headlamps; the 1987-1989 911s require a wire harness adapter that will mate with the bulb." You also say that the H4 is far superior to the H5. What parts do I need to order to replace the H5s on my 1987 911? Is this a plug and play replacement? I am a little confused by your response on this forum where you advise Jim June 1, 2009 to use an H5 on his 1987 Targa, as this seems to contradict your book.
July 17, 2009
  Followup from the Pelican Staff: Sorry for the confusion. The upgrade shown in this article is for the US-spec cars that have the round headlamp encapsulated inside the fender. The book talks about the H4 assembly upgrade, which looks very much like the H5s. Think of it this way, the upgrade mentioned in this article replaces the one-piece bulb with an kit that is the same size as the big one-piece bulb, but adapts to use the much, much smaller high-powered H4 bulb. The article in the book talks about replacing the entire headlamp assembly with the European H4 headlamp assemblies - not just upgrading the bulb assembly.

So, to upgrade your H5s, you would need the complete H4 upgrade assemblies, as shown in the book. A picture is worth a thousand words, if you compare the photos in this article to the ones in the book, it becomes very clear.

My comment to Jim was slightly confusing, I assumed he was talking about upgrading the encapsulated large-style light bulbs that are part of the earlier cars. So, in conclusion, yes you can upgrade to the Euro H4 *assemblies* if you have H5s in your car. 1987-89 cars will need to have a simple harness adapter fashioned out of parts you can find at any hardware store.

To be even more clear, these cars have the H4 European assemblies installed. This car has the normal US-spec headlamps that are somewhat pushed back into the assembly. If you want to preserve this look, you can replace the inside bulb with the H4 kit documented in this article.

I hope this helps clarify, it is indeed confusing. - Wayne at Pelican Parts
 
Menno Comments: Picture 11 shows in the assembly two lights! The H4 bulb and an smaller bulb. The H4 bulb is connected to the existing eletrical pulg. The smaller bulb is the parkinglight, right? In the article you do not mention the smaller lightbulb. Do I have to connect the smaller bulb with the wire from the side marker lamp the grey/red wire 2.2T 1971?

Thank you,

Menno
July 3, 2009
  Followup from the Pelican Staff: I believe that smaller lamp is for parking lamps, and is completely optional. It's a very low wattage bulb, and I think it was only used in some European countries, but I'm not 100% sure. - Wayne at Pelican Parts  
Stephan Comments: What is the purpose of the outer and inner screws? I have purchased a set of used H$ and was wondering how the trim pieces hold onto the headlight assembly, there is only one one for the trim pieces as opposed to 4 on the OEM trim pieces why???
Also, I understand that I need to upgrade to the headlight relay kit, would the actual relay included or just the mounting braket? You post a seperate relay apart from the kit and I am trying to figure out if I need both the kit and the relay. I am trying to find out about these before I place my final order at Pelican

Thank you
Stephan
June 24, 2009
  Followup from the Pelican Staff: The inner / outer screw is a weird mounting system they have for the lamps. There's info on the relay installation if you search the forums, sometimes it's not necessary depending upon what wattage bulbs you use in the lamps, and what year car you have. - Wayne at Pelican Parts  
Jim Comments: I have a 1987 Carrera Targa. Would I be able to install your H4 system?
June 1, 2009
  Followup from the Pelican Staff: The Carreras use an H5 integrated headlamp which is different than this H4 upgrade kit. - Wayne at Pelican Parts  
trav Comments: can these be installed on 1992 C2?
May 26, 2009
  Followup from the Pelican Staff: Yes, with some harness work you can upgrade the H5s to the H4 Euro models. - Wayne at Pelican Parts  

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