I had a persistent problem of hill light warning and TCS warning lights coming on for no apparent reason. There is a wire connection between the stop light switch and the control unit to let the system know when brakes are being applied. Changing the stop light switch cured it. The replaced switch was certainly sticking and the new one was of a different design. Replaced it myself as switch comes with a wiring loom. Need to get on your back under the steering wheel! Not very expensive. My car 2001 TD4
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-- First - double check that you have the right sized fuse. If you're using a 15 instead of a 30 - it'll blow for sure.
-- Maybe the light is too bright for your circuit. Try a dimmer bulb.
-- Next, have you had anything installed in your car BEFORE this started happening??? More specifically, on the same circuit as the one that is blowing??? If yes, you'll need to make sure that a no wire is touching any metal part of the car, or that no screw pierced a wire and now makes contact with metal or water.mthat can easily cause a short and blowbthe fuse.
Take a few moments to inspect the condition of the wires, make sure everything looks good and use electrical tape to repair if need be.
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
15 amp is a fair current draw and for it to blow after a few minutes means that there is a short in that circuit that is allowing a drain to earth that just exceeds the 15 amp. It is in the ignition part of the system and may be a bad connection ( water ) or a problem appearing in the ECM or relay . Run fault codes to find the area of the fault. Because it is taking time to blow the fuse, it will be difficult to find. Check all wiring for rub marks .
If you keep blowing the brake fuse than you have a short in the system. Unplug the brake switch. Install a new fuse. If it did not blow than the problem is after the brake switch. Next unplug the turn signal switch, then plug the stop light switch back in and press the brake pedal. Did the fuse blow. If not than the wiring is good in between the two switches. With the turn signal switch disconnected use a jumper wire in between the light green wire (power from the brake switch) and the orange with light blue wire (power to the right brake lamp). If the fuse blows than there is a short in the right side brake circuit between the plug in and the rear socket assembly. If the fuse does not blow than jump from the light green wire to the Light green with orange wire (power to the left brake lamp). If the fuse blows than the problem is in the left hand brake wiring circuit.
I have a 1998 Range Rover
HSE. The ABS, TC amd Brake light stay on and now I have noticed that it
is becoming harder and harder to stop. It literally feels like I dont
have any brakes at all. I have to pretty much push the brake petal all
the eay down in order to get it to stop. I had the pads and rotors about
6 months ago and I don't know what to do! Help please