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Brake Light Switch Replacement
 
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Pelican Technical Article:

Brake Light Switch Replacement

Nick Czerula

Time:

1.5 hours

Tab:

$35

Talent:

***

Tools:

T25 Torx, DVOM

Applicable Models:

Volvo V70 (1998-01)
Volvo V70 2.4T (2001)
Volvo V70 AWD (1998-99)
Volvo V70 GLT (1998-00)
Volvo V70 GLT SE (2000)
Volvo V70 R (1998)
Volvo V70 R AWD (1999-00)
Volvo V70 T5 (1998-01)
Volvo V70 X/C (2001)
Volvo V70 X/C AWD (1998-00)
Volvo V70 X/C AWD SE (2000)

Parts Required:

Brake light switch

Hot Tip:

Use floor mat from vehicle to kneel on

Performance Gain:

Repair faulty brake light switch

Complementary Modification:

Replace brake light bulbs

The brake light switch is responsible for activating the brake lights when the brake pedal is pressed. Another brake light switch function is to switch cruise control OFF and provide the signal to unlock the shift interlock solenoid.

The brake pedal switch can fail a few different ways. You may have a brake light warning lamp illuminate in your instrument cluster, indicating a problem with the brake light circuit. If none of the brake lights illuminate and the fuse is fine, the brake light switch is most likely the cause. However, be sure to check the rear light warning module, located in the rear side panel of the luggage compartment. See our tech article on the rear light warning module for more information. A few things to remember when checking your brake light switch: check the fuse (find location using fuse index in fuse panel), check brake light switch adjustment, (see steps below for how to adjust), inspect brake light bulbs and use a high impedance digital volt ohm meter (DVOM) when testing the circuit.

The brake light switch is mounted in front of the brake pedal. In this tech article, I will go over how to replace and adjust the brake light switch on Volvo V70 vehicles.

Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Working at the lower trim panel above the pedal cluster, remove the T25 Torx screw (red arrow).
Figure 1

Working at the lower trim panel above the pedal cluster, remove the T25 Torx screw (red arrow).

Pull the panel forward about two inches, then down.
Figure 2

Pull the panel forward about two inches, then down. During this step you are detaching the panel clips (red arrows) from the instrument panel.

Lower the trim panel enough to access the footwell light electrical connector.
Figure 3

Lower the trim panel enough to access the footwell light electrical connector. Disconnect the electrical connector by releasing the clip and pulling it straight out.

Pull the panel down to detach the air duct (red arrow) while feeding the hood release lever through the slot (green arrow).
Figure 4

Pull the panel down to detach the air duct (red arrow) while feeding the hood release lever through the slot (green arrow).

Working at the front of the brake pedal (red arrow), disconnect the brake light switch electrical connector by pulling the connector straight out the brake light switch (green arrow).
Figure 5

Working at the front of the brake pedal (red arrow), disconnect the brake light switch electrical connector by pulling the connector straight out the brake light switch (green arrow). The red arrow points to the brake pedal arm, while the yellow arrow points to the steering column (for orientation).

Once the electrical connector (red arrow) is removed by pulling it straight out, you can remove the brake light switch.
Figure 6

Once the electrical connector (red arrow) is removed by pulling it straight out, you can remove the brake light switch. Move the connector (inset) out of the way for now.

Remove the brake light switch by sliding the white collar forward (green arrow) to allow the clips to be released.
Figure 7

Remove the brake light switch by sliding the white collar forward (green arrow) to allow the clips to be released. Once the collar is forward, pull the brake light switch straight out of the bracket. If the switch will not come out, push it up until the bottom clip (red arrow) breaks. Then pull the switch straight out. Using this method deems the switch unusable. Be sure that you are replacing it, as you need to break the clip.

Slide the switch out of the mounting bracket (red arrow) toward the rear of the vehicle (green arrow).
Figure 8

Slide the switch out of the mounting bracket (red arrow) toward the rear of the vehicle (green arrow).

Before installing the new switch, check that the electrical portion (green arrow) is fully seated in the mounting bracket as indicated by the red arrow.
Figure 9

Before installing the new switch, check that the electrical portion (green arrow) is fully seated in the mounting bracket as indicated by the red arrow. To do this, hold the end with the mounting tabs while pushing the electrical connector in to compress the switch. Note the plunger extension (yellow arrow) when the switch is compressed.

Press the brake pedal down and hold it.
Figure 10

Press the brake pedal down and hold it. I like to use a brake pedal depressor to do this (red arrow).

Then slide the new brake light switch into the mounting bracket.
Figure 11

Then slide the new brake light switch into the mounting bracket. Be sure that the switch plunger is fully extended (red arrow), as mentioned in step 9. Then, slowly release the brake pedal and let it come in contact with the brake light switch (green arrow). As it makes contact, the brake light switch will automatically adjust to correct its position. To adjust the brake light switch, press the brake pedal down. Then push the brake light switch as far it will go into the mounting bracket. Slowly release the brake pedal and let it come in contact with the brake light switch. As it makes contact, the brake light switch will automatically adjust to the correct position. Connect the electrical connector and check the brake light operation.

You can test the wire colors and pin assignments from a 1999 base model V70.
Figure 12

You can test the wire colors and pin assignments from a 1999 base model V70. Use the most up to date wiring diagram when testing your vehicle. To test the switch circuit, start by confirming there is power to the switch. Disconnect the electrical connector and test it using a DVOM negative lead connected to battery negative and the positive lead of the DVOM at the connector (red arrow). You should have battery voltage on the red wire. Then use a fused jumper wire and jump terminal 1 and 2 together. The brake lights should illuminate. If not, check the rear light warning module. See our tech article on the rear light warning module. To test with the switch plugged in, check for battery voltage on terminal 2 when the switch is pressed.

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Comments and Suggestions:
simon c Comments: V70 2003 D5 YY03 UXT
Lower brake lights not working Hi level is fine bulbs and relay replaced how can I test if the stop light switch brake pedal is faulty or what else could it be - I get the "check brake" error message on the dash when pedal is depressed?
October 12, 2016
  Followup from the Pelican Staff: See this tech article for the lamp out module:

http://www.pelicanparts.com/techarticles/Volvo-V70/91-ELEC-Lamp_Out_Module_Testing/91-ELEC-Lamp_Out_Module_Testing.htm

Most likely your issue. This module can also fail causing the brake lamps to fail. You could have a non-working third brake light or main stop lamps. If you have this issue, check the feed into the module and out to the bulbs. See the testing steps below.- Nick at Pelican Parts
 
Bruth Comments: What size Torxx screw do I need?
June 22, 2016
  Followup from the Pelican Staff: T25. - Nick at Pelican Parts  
peterdb Comments: ahh, forgot to give the info of my car, A\Volvo V70 T5 SE, 2.3l 2003 5 auto gear trip250HP. Right hand driving, no further options.
April 22, 2016
  Followup from the Pelican Staff: Ok got it. - Nick at Pelican Parts  
peterdb Comments: my cluster goes out completely when touch the break pedal. sometimes it comes back on by itself. after checking with my ppc3 it gives an error to the break pedal sensor. Is this a question of replacing the break pedal sensor or need to clean it??
April 22, 2016
  Followup from the Pelican Staff: I would replace it first. It may cure the issue. - Nick at Pelican Parts  
Scott Comments: All 3 Brake lights don't work. Fuses are good. Relay makes the click noise and tested. Brake pedal switch seems to move properly. ????
March 6, 2016
  Followup from the Pelican Staff: Did you test as described in the tech article? What were the results? - Nick at Pelican Parts  
useless Comments: Hi yes I had not fitted it properly I removed it put it back in and put it back in and all is good thank you for reply
January 23, 2016
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
useless Comments: please can you help I have just replaced my brake light switch on my 1999 volvo v70 2.5t automatic my brake lights now work and I can get it out of park using the pedal rather than shift override button all good..... no now my brake pedal stays down and brakes engaged unless I lift pedal with foot where do I go from here please help
January 15, 2016
  Followup from the Pelican Staff: The switch may have been installed incorrectly. Check your work to confirm it is OK. - Nick at Pelican Parts  
stephie S. Comments: My brake light went out a few days ago. I don't want to get pulled over for it, but I'd love to do it my self to save money on a mechanic. Thanks for posting an easy step-by-step process, I'll definitely be referring to this when I'm working on it. Thank you.
August 27, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 

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Page last updated: Mon 12/5/2016 02:47:08 AM