Overdrive Switch: Testing and Inspection

O/D Main Switch & O/D OFF Indicator Light Circuit

CIRCUIT DESCRIPTION
The O/D main switch contacts go off when the switch is pushed in and come on when it is pushed once again.
In O/D main switch OFF position, the O/D OFF indicator lights up, and the ECM prohibits shifting to overdrive.





WIRING DIAGRAM

INSPECTION PROCEDURE

Step 1:

Step 2:

Step 3:

Step 4:

O/D OFF indicator light does not light up.

Step 1:

Step 2:

O/D OFF indicator light remains ON.