Overdrive Switch: Testing and Inspection

Operation inspection
1. Turn ignition switch ON.
2. Verify that the O/D indicator light is not illuminated. Depress O/D switch and verify that the O/D indicator light illuminates.
3. If O/D indicator light does not operate, continue with inspection of voltage test.

Voltage inspection
1. Remove center panel.
2. Turn ignition switch ON.








3. Measure voltage at O/D switch connector.

4. If not as specified, check for continuity at O/D switch.
5. Install center panel.

Continuity inspection
1. Disconnect negative battery cable.
2. Disconnect O/D switch connector.








3. Check a continuity on 6 terminal and 7 terminal.
4. Replace selector lever knob if not as specified.
5. Check wiring harness for continuity if switch is operating correctly (from O/D switch to ECM, and from O/D switch to ground).