My brake light stays on all the time. It isn't the abs light .
I replaced the brake fluid level sensor. Light is still on. I checked the harness wire going to the plug and it has juice going to it all the time. I have bled the brakes and have a good pedal, I am stumped as to what the problem could be.Any suggestions?
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Re: My brake light stays on all the time. It isn't the...
ON some master cylinders there is a switch that is located between the 2 pistons in the m/cyl.. When there is a problem or when you bleed the brakes this switch activates and has to be removed and refitted as the pin will stop a piston from working correctly and be jammed in the on position.
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The computer has detected a condition that indicates a fault with the ABS/Traction system. Typically that's caused by a wheel sensor problem, but it can also be caused by a faulty connector, peripheral device or the computer.
The above is the shop or garage answear. How about telling us how to fix the problem , besides replacing the computer or wheel sensor? How do we check these things?
Sometimes can be as simple as a short circuit in the rear break lights or a faulty connection in the break lights.
You can start checking the break light system. Then the sensors and finally the computer.
You could have two separate issues or just one. First check the level of brake fluid. (brake light)Fill it and if the light goes out, then you have to use a CReader or scanner to get the ABS codes. Cold be wheel sensors, broken wire, or the ABS module. If you can't get the brake light to go out, then it is the ABS, three possible causes. One is the ABS module is dead. second is the pump has failed. third is a bad ground wire. check the ground first. The ground is the biggest wire going from the pump /module to the body. When these loose ground, I cut the end off and run a longer wire to a better spot on the body. When you see it, you will know why.
check the water level first, and brake fluid level,
if brake fluid level is too low, check for leakages, check the sensor,
some times is the brakes wear that cause it,
also, i you do all this and still lighting, please check the wiring harness
PRE-DIAGNOSTIC INSPECTIONBefore diagnosing ABS/TCS, perform a comprehensive visual inspection of system as follows.Check ABS/TCS wiring harness connectors for looseness. Check harness routing; pay particular attention to wheel speed sensor wiring harness routing. Check fuses No. 1D, 5B and 6B in instrument panel fuse block. Check fuses No. 1 and 2 in underhood fuse block. Check brake fluid level in master cylinder reservoir. Check brake fluid level in Pressure Modulator Valve (PMV) assembly reservoir. Ensure parking brake is fully released. Ensure parking brake switch is functioning properly. Always perform ABS/TCS system functional check before using DIAGNOSTIC CODE CHARTSThe EBCM/EBTCM has self-diagnostic capability, which can detect system failures. Fault codes stored by EBCM/EBTCM can be displayed using Tech 1 scan tester. There are no provisions for flash code diagnostics.Begin ABS/TCS diagnosis with PRE-DIAGNOSTIC INSPECTION procedure. If failures are found during pre-diagnostic inspection, perform necessary repairs, and proceed with ABS/TCS FUNCTIONAL CHECK. See Fig. 5 .If no failures are found during pre-diagnostic inspection, go to ABS/TCS FUNCTIONAL CHECK. See Fig. 5 . The ABS/TCS FUNCTIONAL CHECK will either indicate ABS/TCS is functioning properly or direct technician to various diagnostic procedures such as diagnostic charts, symptom diagnosis or BRAKE warning light diagnosis.CHART D - TRACTION OFF WARNING LIGHT ON CONTINUOUSLY & NO DTC SET (BUICK WITH UH8 OR U2A INSTRUMENT CLUSTER)Circuit DescriptionWhen ignition switch is first turned to RUN position, EBTCM goes through a self-test, which lasts 2-4 seconds. During self-test, EBTCM commands TRACTION OFF indicator warning light on. Powertrain Control Module (PCM) can also command EBTCM to set a Code 75 which will illuminate TRACTION OFF indicator.Traction control switch is located either on instrument panel center trim plate or driver's front door trim panel. Switch allows driver to select traction control mode (on/off). When traction control system is turned off, TRACTION OFF warning light comes on.EBTCM monitors transaxle temperature through
ok about the abs is possible that the abs cable that goes the the brake caliper is not good.about the brake light check brake fluid level filled up also check the sensor on the brake fluid container also check any malfuntioning wire connection corosive plugs.about the ac check compressor ad freon in order to kick on check the relay or fuses or the compressor is no good
brake light could be a sensor wire or the pads are worn out ,the srs light could be the wiring connections under the front seats ,the connectors need a clean or rubbish under the seat has dislodged them.Abs light coming on could be caused by the low brake pads but its doubtful more like one of the metal toothed rings is loose on the drive shaft ,also could be low on brake fluid if the pads have worn down and the fluid level has dropped
CHECK ALTERNATOR OUTPUT IT SHOULD BE 13.5 TO 14.5 VOLTS WITH ENGINE RUNNING.IF VOLTAGE LOWER 12 VOLTS THAT WILL CAUSE BRAKE AND ANTI LOCK BRAKE LIGHTS TO COME ON BECAUSE THAT NOT ENOUGH POWER FOR ABS BRAKES OPERATION.IF ALTERNATOR GOOD.BRAKE AND ABS LIGHTS ON ALSO MEANS LOW BRAKE FLUID LEVEL CHECK BRAKE FLUID LEVEL.ALSO. YOU HAVING BRAKE FAILURE.YOU NEED TO HAVE GARAGE OR DEALERSHIP CHECK BRAKES SYSTEM.BEFORE BRAKES COMPLETELY FAIL.
Typically on this model along with Q45's there is a built in sensor system. The factory pads come with a sensor, so when the pads are installed there is a wired plug that must be connected to the sensor mounted on the behind the rotor. This was designed to give you a visual warning that the brake pads needed replaced. However since most aftermarket pads for this vehicle do not come with sensors, the connector is left unplugged and the circuit is open causing the light to stay on. Another thing is to check the brake fluid level. Often times as the pads wear the fluid level goes down a little. Once it reaches a certian point it will cause the light to come on as well.