Test Q: The Trailer Electric Brakes Are Inoperative/Do Not Operate Correctly

PINPOINT TEST Q: THE TRAILER ELECTRIC BRAKES ARE INOPERATIVE/DO NOT OPERATE CORRECTLY

Q1-Q3:

Q3-Q5:

Q6-Q8:

Normal Operation
The trailer tow electric brake controller is provided voltage at all times by the battery junction box (BJB) fuse 10 (30A) through circuit 50 (RD). Ground for the trailer tow electric brake controller is provided through circuit 57 (BK). The trailer tow electric brake controller receives voltage from the stoplamp switch through circuit 511 (LG) when the brake pedal is applied. When requested, the trailer tow electric brake controller sends voltage to the trailer tow connector through circuit 43 (DB).

Possible Causes
- Fuse
- Circuit 43 (DB) open, short to ground or voltage
- Circuit 50 (RD) open
- Circuit 57 (BK) open
- Circuit 511 (LG) open
- Trailer tow electric brake controller
- Trailer