Audi brake light warning problem
Thread Starter
New Member
Joined: Mar 2000
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Audi brake light warning problem
Hi people,
I have an 87 5k Quattro and every now and then the brake light warning comes on and I lose most of the braking. Pretty scary. Any ideas what causes this? Otherwise the brakes are good.
John
I have an 87 5k Quattro and every now and then the brake light warning comes on and I lose most of the braking. Pretty scary. Any ideas what causes this? Otherwise the brakes are good.
John
AudiWorld Super User
Joined: Mar 2000
Posts: 9,281
Likes: 1
The "Brake Light" warning means....
..that you have a brake light out!! The "Brake" warning means that you are low on brake fluid!!
At least it does on my '91 90....your model may vary!
---
Andrew
95 90Q
91 90
At least it does on my '91 90....your model may vary!
---
Andrew
95 90Q
91 90
Junior Member
Joined: Mar 2000
Posts: 675
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There is one other sensor on the brake warning light...
not only could it mean you are low on brake or hydralic fluid (but your brake would likely not feel any different unless you are really low on brake fluid), but it also has a pressure sensor for the hydralic brake boost. In order to check if you have a booster problem first check the fluid levels and top them up (make sure you use the right hydralic fluid, the wrong stuff will kill your seals, it is expensive BTW), then start the car and let it idle for a few minutes, this will let the pressure build. Then start pumping the brake pedal, you should get at least a good 10 pumps before the brake warning turns on. If you don't it could be a number of things, first would be the "bomb" (hydralic pressure accumulator), then the brake booster (mounted to the base of the master cylinder), and then the power steering pump.
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