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Headlight Switch Replacement
 
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Pelican Technical Article:

Headlight Switch Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$65

Talent:

**

Tools:

24mm socket

Applicable Models:

Porsche 944 Turbo (1986-89)

Parts Required:

Headlight switch

Hot Tip:

Be careful with aftermarket wires under the dash

Performance Gain:

Working headlights

Complementary Modification:

Check all of your bulbs

The headlight switch on the Porsche 944's are not a typical high fail system on the car, but the nice thing is when they do fail you can change it out in well under an hour. One of the things that you will want to watch out for is that a lot of aftermarket alarm installations use the wiring for the light switch. If you are not having any problems with your wiring on the car now you should be fine if you just replace the switch and leave whatever modifications have been made in place, as the switch simply unplugs from the harness.

Begin by disconnecting the ground cable from the post on the battery.
Figure 1

Begin by disconnecting the ground cable from the post on the battery. This is also a good time to check the condition of the terminal and wiring, as our cable is starting to get a little corrosion (red arrow).

The headlight switch is just to the left of the steering column.
Figure 2

The headlight switch is just to the left of the steering column. You can usually pull the front of the switch straight off using only your hands (red arrow). If yours is on pretty firmly use a trim removal tool or a flathead screwdriver and gently pry the knob off.

The knob is just held in place by a friction fit (red arrow).
Figure 3

The knob is just held in place by a friction fit (red arrow). With the knob off you can see the 24mm nut holding the switch in place (yellow arrow).

Use a 24mm socket or a large set of pliers and remove the nut (red arrow).
Figure 4

Use a 24mm socket or a large set of pliers and remove the nut (red arrow). If you are using pliers take care not to mar the dash surface.

You can now reach under the dash and separate the switch from the wiring harness by pulling it straight off (red arrow).
Figure 5

You can now reach under the dash and separate the switch from the wiring harness by pulling it straight off (red arrow). You can see the hornet's nest of alarm wiring that some previous owner had installed. The alarm wiring tied into the harness for the headlight switch but we just replaced the switch, not disturbing any of the alarm wires and everything worked fine.

The connection on the switch will only fit into the harness in one way so make sure it is properly lined up.
Figure 6

The connection on the switch will only fit into the harness in one way so make sure it is properly lined up. Do not try and force it (red arrow). Installation is the reverse of removal.


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Page last updated: Fri 12/9/2016 02:50:06 AM