Aviator AWD V8-4.6L DOHC VIN H (2003)
Trailer Tow Brake Controller C239
Trailer Tow C439 (4-Pin Connector)
Trailer Tow Relays: RH Turn, LH Turn, Battery Charge, Parking
TRAILER TOW RH TURN RELAY C1187, TRAILER TOW LH TURN RELAY C1188, TRAILER TOW BATTERY CHARGE RELAY
C4021, TRAILER TOW PARKING
