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Brake Light Switch Replacement
 
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Pelican Technical Article:

Brake Light Switch Replacement

Jared Fenton

Time:

1 hour1 hr

Tab:

$25

Talent:

**

Tools:

T20 Torx driver

Applicable Models:

Porsche 955 Cayenne (2004-10)
Porsche 955 Cayenne GTS (2008-10)
Porsche 955 Cayenne S (2003-10)
Porsche 955 Cayenne Turbo (2003-10)
Porsche 955 Cayenne Turbo S (2006-10)

Parts Required:

New brake light switch

Hot Tip:

Install the new switch with the brake pedal back.

Performance Gain:

Working brake lights

Complementary Modification:

Check light on lower panel

The early model Cayenne use a switch and pushrod type switch to activate the brake lights. Over time, the plastic pushrod can wear and the switch can fail. In this article, I'll go over the steps involved with replacing the switch. Note to (2005-08) Cayenne owners: Your car uses a signal from the ABS/PSM system to trigger the lights rather than a switch.

Begin by removing the lower dashboard panel (See our article on Lower Dashboard Panel Removal for more information).

Shown here is a new brake light switch for the Porsche Cayenne.
Figure 1

Shown here is a new brake light switch for the Porsche Cayenne. You'll want to make sure that the pushrod (green arrow) is fully extended prior to installation.

Once you have removed the lower dashboard panel, locate the brake light switch (green arrow) on the brake pedal arm.
Figure 2

Once you have removed the lower dashboard panel, locate the brake light switch (green arrow) on the brake pedal arm. Rotate the switch assembly counter clockwise to remove it from the bracket.

Squeeze the plastic tabs (green arrows) inward on the electrical connector and pull it out of the brake light switch.
Figure 3

Squeeze the plastic tabs (green arrows) inward on the electrical connector and pull it out of the brake light switch.

Fit the new brake light switch in the hole while the brake pedal is pulled fully back towards the rear.
Figure 4

Fit the new brake light switch in the hole while the brake pedal is pulled fully back towards the rear. When you install the new switch, this will self-adjust the new switch.

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Comments and Suggestions:
Stumped Comments: If this is faulty, will I get a 'check brake light ' error on my 2003 Porsche Cayenne turbo? All brakes light up and work fine, but error is always there. And cruise doesn't work.
November 13, 2016
  Followup from the Pelican Staff: If cruise doesn't work the switch can be faulty. You may have a faulty bulb, I would inspect the bulbs and sockets as well. - Nick at Pelican Parts  
Darrell Comments: Thanks, also how do I adjust the switch, when I put in new switch brake lights stay on ???
November 10, 2016
  Followup from the Pelican Staff: Push the brake pedal all the way to floor. Then check that the rod on the switch is fully extended. Release the pedal, it should automatically adjust. - Nick at Pelican Parts  
Darrell Comments: When the brake light switch is going out, will it effect the cruise control on my Porsche Cayenne s???
November 10, 2016
  Followup from the Pelican Staff: YEs. - Nick at Pelican Parts  

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Page last updated: Mon 12/5/2016 02:32:40 AM