Questions and Answers

Ford Explorer No 4WD Shifting Q. I am trying to find out how to check the electric shift control buttons on the dash of a 1992 Ford Explorer. I get no response at all. No clicking from the rear as I should. I get nothing. No sound or 4x4 light. Thanks, D. Hillard

A. I assume you checked all the fuses with a test light or VOM and that they are in good shape.

The Electronic Control Module (ECM) has a diagnostic capability of its internal circuitry. Self test procedure is as follows:

1. Remove the Five-Wire Connector and the Eight Wire Connector from the ECM.
2. Turn ignition switch to the RUN position.
   

3. Activate the system self-test by pressing and releasing the self-test switch. Note the results as indicated by the indicator light: NOTE: The self test switch and indicator light are located on the ECM.
   • A FLASHING Indicator Lamp, (approximately one flash per second) indicates that the ECM is functioning properly.
   • A STEADY Indicator Light indicates that the ECM is inoperative and must be replaced.

You should have power to the red/yellow wire at the switch.

The module is located behind the left B pillar on the 2-door and behind the left C pillar in the 4-door.

There is a procedure for checking the individual circuits, but it is much too involved to put here. You can go to the local public library and get the procedure and wiring diagram in the reference section.