brake light switch

[Conza]

anyone got any pointers on how to change the brake light switch on the master cylinder,
tried doing mine today but cant see how to get to the bolt without dropping the engine slightly.

many thanks in advance

 

[fangio]

I thought it was at the top of the pedal bracket in the foot well?

 

[Conza]

I thought it was at the top of the pedal bracket in the foot well?

Nope it's bolted underneath on the master cylinder and the bolt is facing towards aircon pipes so really hard to get any tool on it

 

[Conza]

Looks like this

 

[fangio]

Not no. 1? I've never in the last 20 years seen a brake light switch not mechanically operated by the pedal.

http://www.partsbase.org/audi/audi-...l-cluster-switch-for-handbrake-warning-light/

 

[Conza]

Not no. 1? I've never in the last 20 years seen a brake light switch not mechanically operated by the pedal.

http://www.partsbase.org/audi/audi-...l-cluster-switch-for-handbrake-warning-light/

dont think so as was supplied one i got from tps

 

[fangio]

Well, I think I'd check if I were you. They stopped making them hydraulic because of the need to bleed the brakes. Wouldn't it be easier just to have a look at the pedal before you start on the m/cyl?

 

[Conza]

It's not a hydraulic switch it looks like works like a electro magnet :/

I'll have a look up by the pedal

 

[irowpod]

@ Fangio the switch is underneath the servo. It's not on the brake pedal

 

[Conza]

@ Fangio the switch is underneath the servo. It's not on the brake pedal

Do u have a pointers etc on how to change it

 

[fangio]

@ Fangio the switch is underneath the servo. It's not on the brake pedal

I'm only going by the parts diagram; I fail to see why any car should need such drastic efforts to simply change a switch!

BUT, it is an Audi......

The part in his picture is a light sensor, no. 10 here, not a switch:-

http://www.partsbase.org/audi/audi-...-brake-master-cylinder-reservoir-brake-fluid/

 

[Conza]

Heres a better pic

 

[fangio]

If that's a brake light switch, how does it know how to put the brake lights on? How does it connect to them?

 

[Conza]

If that's a brake light switch, how does it know how to put the brake lights on? How does it connect to them?

Magic because it's a audi

 

[irowpod]

This switch, is what normally throws error codes.

 

[fangio]

I thought he was changing his brake light switch, the one that switches the stop-lights on? He never mentioned error codes.

 

[Conza]

I thought he was changing his brake light switch, the one that switches the stop-lights on? He never mentioned error codes.

In another thread I have a brake pressure fault and Ross say that this could be at fault so desided to spend £20 on a switch instead of £200 on a abs pump at the moment, and I went to change and couldn't realy see anyway if getting to the bolt, which is why i put this thread up

 

[fangio]

My bad! Thought you meant your brake lights weren't working.

 

[Conza]

My bad! Thought you meant your brake lights weren't working.

well they are but they wernt when I 1st picked it up, but that mite be because the battery was flat etc :/

 

[John ler]

Does this operate the brake lights, I'm trying to find the brake light switch, on 2010 s3 dsg, there isn't one on the pedal/box

 

[Conza]

Does this operate the brake lights, I'm trying to find the brake light switch, on 2010 s3 dsg, there isn't one on the pedal/box

yes this is the one tps supplied for my 2007 a3 sportback 2.0 tdi

 

[John ler]

Did it solve your problem, I've search for hours for brake light switch , they all show on the pedal but I thought this must be it as I don't have a wire down near the pedal, is yours dgs or manual

 

[Conza]

Did it solve your problem, I've search for hours for brake light switch , they all show on the pedal but I thought this must be it as I don't have a wire down near the pedal, is yours dgs or manual

mines manual
and my brake lights are working just got another fault that could be my brake light switch
ive got the brake light switch just haven't got round to changing mine yet as its not a 2 second job

 

[AudiA3JJ]

@ Conza, Sorry to bring up an old thread but did you eventually figure out the best way to change the switch. I looks like a ball ache of a job to get too! Just wondering the best way to approach it and what to remove to get to it.

Thanks!