Aviator AWD V8-4.6L DOHC VIN H (2003)
Test X4-X5
Normal Operation
The trailer battery charging is accomplished through the use of the trailer tow battery charge relay. Power is supplied to the trailer tow battery charge
relay by circuit 175 (BK/YE) and when energized provides power to the trailer tow connector through circuit 49 (OG). The control circuit for the
trailer tow battery charge relay is provided by circuit 1003 (GY/YE). Ground is provided to the trailer tow battery charge relay through circuit 1205
(BK).
Possible Causes
-
Circuit 49 (OG) open.
-
Circuit 175 (BK/YE) open.
-
Circuit 1003 (GY/YE) open.
-
Circuit 1205 (BK) open.
-
Trailer tow battery charge relay.
Test Y
PINPOINT TEST Y: THE TRAILER ELECTRIC BRAKES ARE INOPERATIVE/DO NOT OPERATE CORRECTLY
