Brake Light Turns On And Off When I Push Clutch? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 08-25-2005, 12:14 AM
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The problem is my brake lights flash on and off sometimes when i am not touching the brake pedal. I have noticed that when i push the clutch pedal in, for some reason it turns the brake lights on for a second. I have replaced the brake switch like 5000 miles ago. what could make this happen? Clutch switch? loose wires? light bulbs on the rear brake lights are loose? thanks for the help in advanced.

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#2 (permalink) Old 08-25-2005, 10:53 AM
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Quote:
Originally posted by silver328is@Aug 25 2005, 01:14 AM
The problem is my brake lights flash on and off sometimes when i am not touching the brake pedal. I have noticed that when i push the clutch pedal in, for some reason it turns the brake lights on for a second. I have replaced the brake switch like 5000 miles ago. what could make this happen? Clutch switch? loose wires? light bulbs on the rear brake lights are loose? thanks for the help in advanced.
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I would look up under the driver's foot area at the wiring for the brake switch. See if you can locate any possible spot the clutch pedal movement could cause wire contact with metal and grounding the wire. Move the clutch pedal while you look up there (use a mirror and a drop light on the floor if needed...) and see what the wiring does. If possible use some nylon tie-wraps to secure the wiring out of the way and tighten up any lose or flopping wires. Good luck.




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#3 (permalink) Old 08-25-2005, 12:01 PM
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Yeah, it sounds like your wiring to your clutch and your brake has been somehow entangled, and the actualy wiring itself has been frayed and is touching each other in some place, causing both to come on when only using one.

I would say does the problem work when u hit ur brake but there is really no way to check that.

If you're willing to look at the wiring yourself go for it, otherwise I'd have it checked out! used

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#4 (permalink) Old 08-25-2005, 02:25 PM
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If you have a hydraulic clutch servo then the reservoir for both items is the brake master cylinder and I wonder if the servo is leaking and when you engage the clutch the fluid level drops momentarily in the master cylinder giving you a false brake light.
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#5 (permalink) Old 08-25-2005, 06:52 PM
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I do i know is i have a hydraulic clutch servo? i have a 97 328is manual. Are you saying that the brake fluid is has somthing to do with the clutch? Can you give me more info.

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#6 (permalink) Old 08-25-2005, 09:01 PM
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Your car has a hydraulic clutch and that means that there is a slave cylinder under the car at the clutch that helps reduce pressure required to operate the clutch. This hydarulic slave cylinder utilizes brake fluid to operate and the brake fluid is coming from the brake master cylinder (the brakes and clutch slave share the same fluid and fluid reservoir). My thought is that when you step on the clutch pedal, the fluid level may be dropping to a point that the brake system thinks it is low on fluid and you get a prompt. Just one idea.
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#7 (permalink) Old 08-26-2005, 06:07 PM
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thanks a lot, im going to figure it out this weekend.

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#8 (permalink) Old 08-27-2005, 04:28 AM
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first check the adjusment on the brake switch , looks like its out of it ,see how

much travel in the brake pedal makes the lights go on , if you barely touch it and

the lights go on , try to push the switch towards the stop in the pedal , or inwards

if you are talking about the rear stop lights ,this is the only area to check that has

to do with it, if you are talking about the brake warning light in the dash ,thats

another story.

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If everithing fails try the hammer. obd2? <a href='http://www.obd2guru.com' target='_blank'>obd2guru.com</a>
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