Pinpoint Test H: The STOPLAMPS Are Inoperative

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK CIRCUIT 1119 (RD) FOR AN OPEN
- Key in OFF position.
- Disconnect: Stoplamp Switch C278.
- Measure the voltage between the stoplamp switch C278-1, circuit 1119 (RD), harness side and ground.
  
  Fig 1: Checking Circuit 1119 (RD) For An Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to H2.

No : VERIFY the BJB fuse 14 (20A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
H2 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN
- 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.
  
  Fig 2: Checking Circuit 10 (LG/RD) For An Open
  Courtesy of FORD MOTOR CO.
- Do the stoplamps illuminate?
Yes : INSTALL a new stoplamp switch. REFER to STOPLAMP SWITCH . TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.