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Fog Light Dimmer Switch Replacement
 
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Pelican Technical Article:

Fog Light Dimmer Switch Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$60 to $140

Talent:

**

Tools:

24mm socket, Philips head screwdriver

Applicable Models:

Porsche 944 Turbo (1986-89)

Parts Required:

Fog light and dimmer switch

Hot Tip:

Be careful with aftermarket wires under the dash

Performance Gain:

Working switches

Complementary Modification:

Check all of your bulbs

The dimmer switch and fog light or running light switches do wear out and break over time. Changing them out is not as easy as changing out the headlight switch but can be done in under an hour. One of the things that you will want to watch out for is that a there can be a mess of aftermarket alarm wiring behind the dash and attached to the headlight switch, so be careful not to disturb anything, as that can cause additional problems.

You will need to first remove the steering wheel. Please see our article on steering wheel removal for additional information.

If you did not disconnect the battery to remove the steering wheel begin by disconnecting the ground cable from the post on the battery.
Figure 1

If you did not disconnect the battery to remove the steering wheel 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).

To replace the switches you will need to just remove the headlight switch from the trim piece, as you will need to remove the trim piece to get access to the fog and dimmer switches (yellow arrow).
Figure 2

To replace the switches you will need to just remove the headlight switch from the trim piece, as you will need to remove the trim piece to get access to the fog and dimmer switches (yellow arrow). The headlight switch is just to the left of the steering column. You can usually just 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. With the nut off you can just push the headlight switch back and out of the trim piece.

With the steering wheel off use a Philips head screwdriver and remove the three screws on the column surround (red arrows).
Figure 5

With the steering wheel off use a Philips head screwdriver and remove the three screws on the column surround (red arrows).

Remove the column surround and use the Philips head screwdriver to remove the screws under and inside of the column (red arrows).
Figure 6

Remove the column surround and use the Philips head screwdriver to remove the screws under and inside of the column (red arrows).

Use a trim removal tool and pop off the trim piece beside the vent and remove the two Philips head screws (red arrows).
Figure 7

Use a trim removal tool and pop off the trim piece beside the vent and remove the two Philips head screws (red arrows).

Using a Philips head screwdriver remove the single screw on the end of the dash trim piece (red arrow).
Figure 8

Using a Philips head screwdriver remove the single screw on the end of the dash trim piece (red arrow).

Next, remove the three Philips head screws holding the switch trim piece and the vent (red arrows).
Figure 9

Next, remove the three Philips head screws holding the switch trim piece and the vent (red arrows). The vent is attached to the lower vent in the switch trim piece so they have to be removed together.

With all the screws removed you can gently remove the trim piece from the dash.
Figure 10

With all the screws removed you can gently remove the trim piece from the dash. The switches unclip from the trim on the top (red arrow) and then separate from the wiring harness. Installation is the reverse of removal.

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Page last updated: Fri 12/2/2016 02:49:30 AM