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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1928 (Exterior Lighting System (F250-F550)) >> Diagnostic Tests >> Stoplamps >> Pinpoint Tests >> Pinpoint Test H: The Stoplamps Are Inoperative >> Pinpoint Test H: The STOPLAMPS Are Inoperative

Pinpoint Test H: The STOPLAMPS Are Inoperative

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
  1. H1 CHECK THE VOLTAGE TO THE STOPLAMP SWITCH 
    • Key in OFF position.
    • Disconnect: Stoplamp Switch C278
      • Fig 1: Checking Circuit For Voltage
      GF0008303Courtesy of FORD MOTOR CO.
    • Measure the voltage between the stoplamp switch C278-1, circuit 10 (LG/RD), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  H2.
    2. NO  : VERIFY the CJB fuse 18 (20A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
  2. H2 CHECK THE STOPLAMP SWITCH 
      Fig 2: Connecting Fused Jumper Wire
      GF0008304Courtesy of FORD MOTOR CO.
    • Connect a fused jumper wire (20A) between the stoplamp switch C278-1, circuit 10 (LG/RD), harness side and the stoplamp switch C278-2, circuit 511 (LG), harness side.
    • Do the stoplamps illuminate? 
    1. YES  : INSTALL a new stoplamp switch. REFER to Stoplamp Switch .
    2. NO  : REPAIR circuit 511 (LG). TEST the system for normal operation.
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