Test Procedure

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

J1 - CHECK RBJB FUSE 22 (20A)
- CHECK the RBJB fuse 22 (20A)
- Is the fuse OK?
  1. Yes : GO to J2.
  2. No : INSTALL a new fuse. TEST the system for normal operation.

J2 - CHECK IGNITION SWITCH
- Carry out the Ignition Switch Component Test.
  Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
- Is the ignition switch OK?
  1. Yes : GO to J3.
  2. No : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES TEST the system for normal operation.

J3 - CHECK CIRCUIT 30-BB20 (RD)
- Disconnect: Ignition Switch C250.
- Measure the voltage between ignition switch C250-7, circuit 30-BB20 (RD), harness side, and ground.
- Is the voltage greater than 10 volts?
  1. Yes : GO to J4.
  2. No : REPAIR the affected circuit(s). TEST the system for normal operation.

J4 - CHECK CIRCUIT 75-DD1 (YE)
- Key in OFF position.
- Disconnect: BJB C270a.
- Key in ON position.
- Measure the voltage between the BJB C270a-15, circuit 75-DD1 (YE), and ground.
  
  Fig 1: Measuring The Voltage Between The BJB C270A-15, And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  1. Yes : GO to J5.
  2. No : REPAIR the circuit. TEST the system for normal operation.

J5 - CHECK BJB FUSE 13 (5A)
- CHECK the BJB fuse1 3 (5A).
- Is the fuse OK?
  1. Yes : CHECK the instrument cluster module (ICM) for faults. REFER to INFORMATION, GAUGES & WARNING DEVICES .
  2. No : INSTALL a new fuse. TEST the system for normal operation.