PINPOINT TEST H: THE 4x4 INDICATOR IS ALWAYS ON - FOUR-WHEEL DRIVE SYSTEM OPERATES CORRECTLY
WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- H1 MONITOR THE 4x4 INDICATOR
- Verify the vehicle is in 2WD.
- Observe the 4x4 indicator.
- Disconnect the anti-lock brake (ABS) module C135.
- Key in ON position.
- Does the 4x4 indicator go off?
- Yes : REFER ANTI-LOCK CONTROL for further diagnosis.
- No : GO to H2.
- H2 CHECK THE 4WD CONTROL MODULE
- Disconnect: 4WD Control Module C281b.
- Does the 4x4 indicator go off?
- Yes : GO to H4.
- No : GO to H3.
- H3 CHECK THE INSTRUMENT CLUSTER
- Disconnect: Instrument Cluster C220c.
- Does the 4x4 indicator go off?
- Yes : REPAIR circuit 210 (LB). TEST the system for normal operation.
- No : REPAIR the instrument cluster as necessary. REFER to INSTRUMENT CLUSTER . TEST the system for normal operation.
- H4 CHECK FOR CORRECT MODULE OPERATION
- Check for:
- corrosion
- pushed-out pins
- Connect any disconnected connectors making sure they are seated correctly.
- Make sure all other system connectors are fully seated.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new 4WD control module. REFER to FOUR-WHEEL DRIVE (4WD) CONTROL MODULE in this section. CLEAR the DTCs. REPEAT the self-test.
- No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
- Check for: