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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2122 (Exterior Lighting System) >> Diagnostic Tests >> Trailer Lamps >> Pinpoint Tests >> Pinpoint Test AA: The Trailer Lamps Are On Continuously >> Pinpoint Test Aa: The Trailer Lamps Are On Continuously

Pinpoint Test Aa: The Trailer Lamps Are On Continuously

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. AA1 CHECK FOR VOLTAGE AT THE TRAILER TOW CONNECTOR 
    • Key in OFF position.
    • Disconnect: Trailer Tow C439
    • Key in ON position.
    • Measure the voltage the between trailer tow connector, harness side and ground as follows:
      Trailer Tow Connector-Pin Circuit
      C439-2 CAT06 (YE)
      C439-1 CAT09 (GN)
      C439-3 CAT11 (BN)
    • Is any voltage present? 
    1. YES  : Go to  AA2.
    2. NO  : The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
  2. AA2 CHECK THE SUSPECT RELAY 
    • Key in OFF position.
    • Disconnect: Suspect Trailer Tow Relay
    • Carry out the component test for the suspect trailer tow relay. Refer to appropriate COMPONENT TESTING article.
    • Is the trailer tow relay OK? 
    1. YES  : REPAIR circuit CAT06 (YE) (LH turn), circuit CAT09 (GN) (RH turn), or circuit CAT11 (BN) (parking lamps) for a short to voltage. TEST the system for normal operation.
    2. NO  : INSTALL a new turn trailer tow relay. TEST the system for normal operation.
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