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Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1996 Ford RV Cutaway, 1996 Ford Pickup, 1996 Ford F-Super Duty, 1996 Ford Econoline, and 1996 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

  1. 1) DTC 0381

    This DTC indicates that PCM has detected a glow plug warning light circuit malfunction. Possible causes for this DTC are:
    • Open WAIT TO START light.
    • Open or grounded circuit.
    • Faulty Powertrain Control Module (PCM).

    Start engine and observe WAIT TO START light. If light stays on, go to next step. If light does not stay on, go to step  3).

  2. 2) Check Black/Pink Wire For Short To Ground

    Turn ignition off. Disconnect PCM 104-pin connector. Turn ignition on. If WAIT TO START light illuminates, locate and repair short in circuit No. 464 (Black/Pink wire) between WAIT TO START light and PCM. Clear DTCs, and repeat QUICK TEST . If WAIT TO START light is off, replace PCM. Clear DTCs, and repeat QUICK TEST .

  3. 3) Check Fuse

    Turn ignition off. Check fuse No. 18 (15-amp) (Econoline), or No. 17 (10-amp) (Pickup), located in instrument panel fuse block. If fuse is okay, go to next step. If fuse is blown, go to step  5).

  4. 4) Check Bulb

    Remove and inspect WAIT TO START bulb. If bulb is okay, go to step  6). If bulb is bad, replace bulb. Reconnect all connectors, clear DTCs and repeat QUICK TEST .

  5. 5) Check Red/Yellow Wire For Short To Ground

    Ensure WAIT TO START bulb is removed and ignition is off. Measure resistance between ground and Red/Yellow wire at WAIT TO START bulb socket. If resistance is more than 10 k/ohms, replace fuse. Clear DTCs, and repeat QUICK TEST . If resistance is 10 k/ohms or less, locate and repair short to ground in Red/Yellow wire. Replace fuse. Clear DTCs, and repeat QUICK TEST .

  6. 6) Check Red/Yellow Wire For Open

    Turn ignition on. Measure voltage between ground and Red/Yellow wire at WAIT TO START bulb socket. If battery voltage is present, go to next step. If battery voltage is not present, locate and repair open circuit in Red/Yellow wire between fuse and WAIT TO START light. Clear DTCs, and repeat QUICK TEST .

  7. 7) Check Black/Pink Wire For Open

    Disconnect PCM 104-pin connector, and inspect for damaged pins, corrosion and loose wires. Repair as necessary. Install Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between Black/Pink wire at WAIT TO START bulb socket and test pin 80 at breakout box. If resistance is less than 5 ohms, replace PCM. Reconnect all connectors. Clear DTCs, and repeat QUICK TEST . If resistance is 5 ohms or more, locate and repair open circuit in Black/Pink wire. Clear DTCs, and repeat QUICK TEST .
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