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.

K1 - 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 K2.
  2. No : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES TEST the system for normal operation.

K2 - 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 K3.
  2. No : REPAIR the affected circuit(s). TEST the system for normal operation.

K3 - CHECK CIRCUIT 15-DD4 (GN/BK)
- Measure the voltage between the BJB C270a-3, circuit 15-DD4 (GN/BK), and ground.
  
  Fig 1: Measuring Voltage Between BJB C270A-3, Circuit 15-DD4 (GN/BK), And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  1. Yes : GO to K4.
  2. No : REPAIR the circuit. TEST the system for normal operation.

K4 - CHECK BJB FUSE 17 (5A)
- CHECK the BJB fuse1 7 (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.