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

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

Y1-Y2:

Y2-Y4:

Y5-Y6:

Normal Operation
The trailer brake control module receives battery voltage from the central junction box (CJB) fuse 105 (30A) through circuit 50 (RD) and provides output voltage to the trailer tow connector through circuit 43 (DB). The trailer brake control module is grounded through circuit 57 (BK). The trailer brake control module receives voltage input when the parking lamps are illuminated through circuit 14 (BN). When the brake pedal is applied, the trailer brake control module receives voltage input through circuit 511 (LG).

Possible Causes
- Fuse
- Circuit 14 (BN) open
- Circuit 43 (DB) open, short to voltage or ground
- Circuit 50 (RD) open
- Circuit 57 (BK) open
- Circuit 511 (LG) open, short to voltage or ground
- Trailer brake control module
- Trailer