Brake Pedal Position Switch Signal Circuit Troubleshooting
Brake Pedal Position Switch Signal Circuit Troubleshooting1. Check the brake lights.
Are the brake lights on without pressing the brake pedal?
YES - Inspect the brake pedal position switch adjustment.
NO - Go to step 2.
2. Press the brake pedal.
Do the brake lights come on?
YES - Go to step 3.
NO - Go to step 4.
3. Measure voltage between ECM connector terminals A32 and B20 with the brake pedal pressed.
4. Inspect the STOP (10 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES - Repair open in the wire between the brake pedal position switch and the STOP (10 A) fuse. Inspect the brake pedal position switch.
NO - Repair short in the wire between the ECM (A32) and the STOP(10 A) fuse. Replace the STOP (10 A) fuse.