ABS and Brake lights on...
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Senior User
Joined: Jan 2004
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From: allen park
ABS and Brake lights on...
I had some issues with the front brakes recently, and replaced rotors and pads on both sides. Approximately 6 months before that I replaced drums, shoes and the entire spring kit of the rear brakes. So I know I have a good brake system without leaks. The master cylinder is sitting at an odd angle on my truck. Pictures show how the fluid level is sitting with the truck on level ground. I'm pretty sure the lights are kicking on because the master cylinder is sensing low fluid level. The lights were kicking on before I changed the front brakes. The brake pedal is solid and high, so no problems there. What gives? Anybody have any idea what would cause the brake master cylinder to sit at such an awkward angle? The truck is stock other than a little bigger tire, but I changed those almost a year ago and this is a recent problem. Thanks for any help you can offer.
*EDIT* Also... the VSS sensor was replaced less than a month ago in an attempt to solve a bad speedo problem. The lights were coming on before the VSS sensor was replaced as well.
*EDIT* Also... the VSS sensor was replaced less than a month ago in an attempt to solve a bad speedo problem. The lights were coming on before the VSS sensor was replaced as well.
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Joined: Nov 2003
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From: Where the war is...
Brake light might be on due to parking brake cable either being broken or set; check and see if yours does NOT set (ie. broken), that can cause the brake light to come on. On the ABS, check the rear ABS sensor on the differential, it will trip the ABS light if it is faulty. I ended up replacing both P-brake cables and the ABS sensor to correct both of these within last six months or so, approx 90k miles or so.
Thread Starter
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Senior User
Joined: Jan 2004
Posts: 427
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From: allen park
Brake light might be on due to parking brake cable either being broken or set; check and see if yours does NOT set (ie. broken), that can cause the brake light to come on. On the ABS, check the rear ABS sensor on the differential, it will trip the ABS light if it is faulty. I ended up replacing both P-brake cables and the ABS sensor to correct both of these within last six months or so, approx 90k miles or so.
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Senior User
Joined: Jan 2004
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From: allen park
I haven't yet had a chance to get at the codes on the ABS system, but driving home today the lights came on again... when I got it home, I turned it off.. waited a minute or so and turned it back on.. and without moving the ABS and brake light immediately came back on. So I checked the fluid level, it was good, and I wiggled the reservoir, got back into the truck and turned it on and sure as water is wet the lights stayed out. So now I'm thinking the fluid level sensor is stuck or gone retarded. With the fluid being all dark and nasty like, will a complete brake system flush with clean fluid solve this problem? Or do I have to replace the master cylinder entirely?
