Flex AWD V6-3.5L (2009)
Trailer Lamps: Initial Inspection and Diagnostic Overview
Special Tools Used With Diagnostics
Trailer Lamps
Principles Of Operation
Trailer Lamps
Principles of Operation
The trailer park and stop/turn lamps are supplied power by relays that are energized to correspond with the exterior lighting functions of the vehicle.
The trailer reverse lamps share the output from the vehicle reversing lamps relay.
The trailer tow battery charge relay is energized when the ignition is in the RUN state.
The vehicle is equipped with circuitry to support the installation of an aftermarket Trailer Brake Control (TBC) module (installed by the customer). To
support the aftermarket TBC module, the vehicle circuitry only supplies voltage, ground, stoplamp switch input and a brake controlling circuit to the
trailer tow connector. The trailer electric brakes themselves are controlled by the aftermarket TBC module and not the vehicle itself.
Inspection And Verification
Trailer Lamps
Inspection and Verification
1. Verify the customer concern.
2. Verify the exterior lighting system of the vehicle is operating correctly. If not, refer to the appropriate pinpoint test.
3. Visually inspect for obvious signs of electrical damage.
