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Home >> Ford >> 2009 >> Taurus X SEL, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1360 (Exterior Lighting System) >> 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 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 CHECK CIRCUIT 1119 (RD) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Stoplamp Switch C278
      • Fig 1: Measuring Voltage
      GF0011078Courtesy of FORD MOTOR CO.
    • Measure the voltage between the stoplamp switch C278-1, circuit 1119 (RD), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  H2.
    2. NO  : VERIFY the BJB fuse 14 (20A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
  2. H2 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN 
      Fig 2: Connecting Fused Jumper Wire
      GF0011080Courtesy of FORD MOTOR CO.
    • Connect a fused (20A) jumper wire between the stoplamp switch C278-1, circuit 1119 (RD), harness side and the stoplamp switch C278-2, circuit 10 (LG/RD), harness side.
    • Do the stoplamps illuminate? 
    1. YES  : INSTALL a new stoplamp switch. REFER to Stoplamp Switch . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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