Overdrive Switch: Testing and Inspection

O/D Main Switch & O/D Off Indictor Light Circuit

CIRCUIT DESCRIPTION
The O/D main switch contacts go open when the switch is pushed in and go closed when it is pushed out. If O/D main switch is at OFF position, the O/D OFF indicator light lights up and the ECM prohibits shifting 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