Question about Cars & Trucks
Hi, A bit of background to the problem. Recently I replaced the clutch lever and tested all functions on the controls on the left handlebar. Horn etc all worked. A few days later my horn stopped working. That I could live with; but on the ride home from work a driver pointed out that my taillight was out. I had done my usual checks and the tail light was on and brake lights worked before I set off. I have checked the fuses and they are fine for the horn/light. I can’t see anything with the wiring. Any idea what would kill both? I recent installed a new end can, but I have no idea if heat/vibration could be affecting it. Cheers
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Posted on Jan 02, 2017
There definitely should be a fuse for your brake lights. It should be inside the car fuse box, but sometimes it'll be under the hood (very rare). There's also a switch above the brake pedal that turns your brake lights on. This switch may be faulty
Posted on Aug 25, 2009
Tips for a great answer:
If the test lamp illuminates, refer to the Horn Test.
Ignition OFF, disconnect the inline harness connector C275. Ignition ON, test for B+ between the horn relay control circuit terminal B and ground.
If less than B+, test the control circuit for an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
Momentarily connect a 3-A fused jumper wire between the control circuit terminal B and ground. The horns should work.
If the horns do not work, replace the underhood fuse block.
If all circuits test normal, test or replace the horn switch
The PCB relay horn system consists of the following components:
Horn PCB relay
Body control module (BCM)
HORN fuse 15 A
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