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Home >> Ford >> 2018 >> Focus SEL, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 272 (Exterior Lighting (1 Of 2)) >> Description And Operation >> Exterior Lighting - System Operation and Component Description >> System Operation - Trailer Lamps >> Trailer Reversing Lamps

Trailer Reversing Lamps

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

When the transmission is in REVERSE, the PCM sends a message over the HS-CAN1 to the BCM indicating the transmission is in REVERSE. The BCM provides ground to the BJB lamps trailer tow relay (non-replaceable) when it receives the message that the transmission is in REVERSE and the ignition is in RUN. When the BCM provides ground the reversing lamps trailer tow relay, the relay is energized and the relay provides reversing lamp voltage to the trailer tow connector.

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