Brake light switch was covered under a recall at one time... if not replaced on your vehicle, it should be a free repair at your local VW Dealer.

Try pulling UP on the brake pedal to see if the lights go off. I'll look for a fuse # that you can pull... reply back after you have pulled up on the
pedal and I should have a fuse number for you by then.

Thomas

Answered by exovcds
0 questions asked

If you are losing power and the brakes are not returning all the way they may be stuck and not releasing properly. This is overheating the brakes and creating a dangerous situation. If the brake pedal moves when you pull on it and the light goes off that is good as exovcds stated. However, to be safe I would jack up each wheel and make sure it moves freely.

Answered by DrCranknWrench (expert)
3,292 answers provided

The loss of power is because the switch is sending a "brake applied" (even though no actual pressure is applied) signal to the ECM.... that is
causing it (the ECM) to reduce power.

I am not aware of "brake dragging issues" with the Passats.

Thomas

Answered by exovcds
0 questions asked

Thanks exovcds. I was very concerned that it could be a safety issue and did not want to take any chances. I am glad you are an expert in Volswagons. Specific information is hard to come by and always appreciated. Thanks

Answered by DrCranknWrench (expert)
3,292 answers provided

No problem, you could also be right... just thought I'd explain the bit about the brake light switch.

Thomas

Answered by exovcds
0 questions asked

Never heard of that type of signal to ECU. Is it reducing power to the engine?

Answered by DrCranknWrench (expert)
3,292 answers provided

ECM ABS TCM all pay attention to brake (light) switch... gas pedal signal says go, but brake pedal says I'm applying brakes. Someone (control unit) is going
to get confused and performance / driveability will be affected (shifting, accelerating, traction control).

Thomas

Answered by exovcds
0 questions asked

That is great information to know and will help me to help a customer in the future. So I really appreciate it. I have learned a good bit from other techs since working here. I have gotten KHLOW to help me with a few issues that I could not figure out. He is very helpful as well as everyone else. Anybody will help you out if you message them. It is a really good team of people and I hope you stay aboard and join in on the fun.
Thanks again
Dr. C

Answered by DrCranknWrench (expert)
3,292 answers provided