Red dash brake warning light?
Thread Starter
Rennlist Member
Joined: Dec 2010
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Red dash brake warning light?
Hi all. I have a red dashboard light on. The one with the circle with the dashed lines outside the circle on the right and left side...
Pretty sure it's the red brake warning light. I checked my brake fluid and it's full, and I made sure the wires are secure on the brake fluid cap.
Any thought s as to what it could be? Pads where changed about 10k miles ago.
I have been noticing an audible "clunk" of the left front wheel when I hit a pothole or big bump if that helps. Drives fine other then that...
The car has about 70K miles on it.
Thoughts?
-Matt
Pretty sure it's the red brake warning light. I checked my brake fluid and it's full, and I made sure the wires are secure on the brake fluid cap.
Any thought s as to what it could be? Pads where changed about 10k miles ago.
I have been noticing an audible "clunk" of the left front wheel when I hit a pothole or big bump if that helps. Drives fine other then that...
The car has about 70K miles on it.
Thoughts?
-Matt
Racer
Joined: Apr 2011
Posts: 416
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From: Space Coast, FL
Is the warning light always on? When is the last time your changed the brake fluid? If the fluid system is okay it could be a pad warning contact. Either worn pads or perhaps a sensor worked loose and is making contact elsewhere.
Last edited by EntropyChaser993; Nov 21, 2011 at 12:46 PM. Reason: .
Thread Starter
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Changed fluid 20k miles ago. Topped it off last week.
Light is intermittent. Sometimes doesn't come on for 20 minutes, sometimes turns right on. But once on, won't go off until the car is turned off....
Light is intermittent. Sometimes doesn't come on for 20 minutes, sometimes turns right on. But once on, won't go off until the car is turned off....
Instructor
Joined: Sep 2003
Posts: 230
Likes: 18
From: Berkshire, UK
You shouldn't need to top up brake fluid. You may have a leak in the system which is causing a loss of brake pressure. Go back to your drivers handbook and check exactly what that light refers to (sorry, I can't remember each of the lights specifically). On my old C4 I was thinking a warning light was pad sensors, but it turned out to be a low brake pressure warning - the pressure boost pump that sits in the trunk behind the PU was leaking. It had to work harder than normal to raise the pressure and hence the warning light came on intermittantly whilst driving. The same pump system is used in the turbo.
Racer
Joined: Apr 2011
Posts: 416
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From: Space Coast, FL
Stewart offered some sound advise and that is where I was going with my questions about the fluid change. Earlier this year I had the light come on and it was an issue with the pressure in the ABS hydraulic unit (small leak). Ultimately had to replace the unit and now the system is fine. Check for leaks around the ABS hydraulic unit and around the pump.
I have learned that the brake fluid has a tendency to go bad and "gunk up" in these cars. To avoid potential issues in the brake hydraulic system many 993 owners bleed the system and replace brake fluid every 1-2 years.
I have learned that the brake fluid has a tendency to go bad and "gunk up" in these cars. To avoid potential issues in the brake hydraulic system many 993 owners bleed the system and replace brake fluid every 1-2 years.
Race Director
Joined: Nov 2006
Posts: 15,862
Likes: 1,631
From: Clifton, NJ
You shouldn't need to top up brake fluid. You may have a leak in the system which is causing a loss of brake pressure. Go back to your drivers handbook and check exactly what that light refers to (sorry, I can't remember each of the lights specifically). On my old C4 I was thinking a warning light was pad sensors, but it turned out to be a low brake pressure warning - the pressure boost pump that sits in the trunk behind the PU was leaking. It had to work harder than normal to raise the pressure and hence the warning light came on intermittantly whilst driving. The same pump system is used in the turbo.
The brake pressure warning is the one with the arrows facing away from each other.
