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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2122 (Exterior Lighting System) >> Diagnostic Tests >> Trailer Lamps >> Pinpoint Tests >> Pinpoint Test X: The Trailer Lamps Are Inoperative - All >> Pinpoint Test X: The Trailer Lamps Are Inoperative - All

Pinpoint Test X: The Trailer Lamps Are Inoperative - All

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.
NOTE: The battery ground cable must be disconnected for accurate test results when checking ground circuits for continuity to ground.
  1. X1 CHECK CIRCUIT RAT08 (WH) FOR AN OPEN 
    • Disconnect: Trailer Tow C439
    • Measure the resistance between the trailer tow C439-4, circuit RAT08 (WH), harness side and ground.
      • Fig 1: Checking Circuit For Open
      GF0011118Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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