Parts Catalog Accessories Catalog Tech Info Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Brake & Clutch Light Switch Replacement
 
Bookmark and Share

Pelican Technical Article:

Brake & Clutch Light Switch Replacement

Nick Czerula

Time:

1.5 hours

Tab:

$35

Talent:

***

Tools:

Phillips screwdriver, small flathead

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

Brake light switch / Clutch switch

Hot Tip:

Use floor mat from vehicle to kneel on

Performance Gain:

Repair faulty brake or clutch light switch

Complementary Modification:

Replace brake light bulbs

The brake light switch is mounted in front of the brake pedal and is responsible for activating the brake lights when the brake pedal is pressed. 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. I have also seen where the brake lights stay on all the time and the warning lamp is also on. If the lighting control module sees a fault with the brake light switch, it will turn the brake lights on all the time. This is for safety. A few things to remember when checking your brake light switch: check 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. When testing, use a high impedance digital volt ohm meter (DVOM).

The clutch switch is used to notify the DME that you pressed the clutch pedal. The signal generated by the clutch pedal switch is used for engine starting, engine performance and traction / ABS control. The clutch pedal switch is mounted to the side of the clutch master cylinder. Replacing it is quite easy and I will show you how a little later in this tech article.

Remember your car may have been serviced before and 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 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. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The brake light switch (blue arrow) is mounted in front of the brake pedal and the clutch switch is mounted to the clutch master cylinder (red arrow).
Figure 1

The brake light switch (blue arrow) is mounted in front of the brake pedal and the clutch switch is mounted to the clutch master cylinder (red arrow). Remove the lower left side instrument panel trim. See our tech article on Lower left side instrument trim panel replacing.

Working at the front of the brake pedal, disconnect the brake light switch (blue arrow) electrical connector by pulling connector straight up and out the brake light switch (red arrow).
Figure 2

Working at the front of the brake pedal, disconnect the brake light switch (blue arrow) electrical connector by pulling connector straight up and out the brake light switch (red arrow).

Remove brake light switch by sliding switch (red arrow) out of mounting bracket toward rear of vehicle (blue arrow).
Figure 3

Remove brake light switch by sliding switch (red arrow) out of mounting bracket toward rear of vehicle (blue arrow).

Once electrical portion of switch is removed, pull mount / adjuster (red arrows) out of mounting bracket by releasing tabs.
Figure 4

Once electrical portion of switch is removed, pull mount / adjuster (red arrows) out of mounting bracket by releasing tabs. The blue arrow points the bottom tab, there is one at the top of the adjuster also.

The new switch will come assembled.
Figure 5

The new switch will come assembled. Separate the switch (red arrow) from the mount (green arrow).

Press the mount / adjuster (red arrow) into the pedal mounting bracket.
Figure 6

Press the mount / adjuster (red arrow) into the pedal mounting bracket. Then slide the switch in (blue arrow). Press the brake pedal down and hold it, then slide the new brake light switch all the way into the mounting bracket. Then, slowly release brake pedal and let it come in contact with brake light switch. As it makes contact, the brake light switch will automatically adjust to correct position. Connect electrical connector and check brake light operation.

Working at the side of the clutch master (blue arrow), disconnect the clutch switch electrical connector.
Figure 7

Working at the side of the clutch master (blue arrow), disconnect the clutch switch electrical connector. It is located on the left side of the clutch switch. Grab the electrical connector (inset) and pull it straight out of the clutch switch.

To remove the clutch switch from the clutch master cylinder, lever the top (red arrow) of switch near where electrical connection is, and pull away from clutch master cylinder.
Figure 8

To remove the clutch switch from the clutch master cylinder, lever the top (red arrow) of switch near where electrical connection is, and pull away from clutch master cylinder. This will unclip the switch and release it from the clutch master cylinder.

This photo shows the clutch switch (red arrow) being removed from the clutch master cylinder (green arrow).
Figure 9

This photo shows the clutch switch (red arrow) being removed from the clutch master cylinder (green arrow). To install the new switch, slide the rear of switch into clutch master cylinder, then press area near electrical connection into the clutch master cylinder. The switch will snap into place. Once installed, connect electrical connector and reassemble trim panel. Check that the clutch switch is functioning properly by starting your vehicle and you are done.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Privacy Statement]
 [Contact Us] [About Us] [Shipping] [Map to our Location] [Careers]

Copyright © Pelican Parts Inc.

Page last updated: Mon 12/5/2016 02:58:48 AM