Neutral Safety Switch: Testing and Inspection

Inhibitor Switch Test:

1. Disconnect the transmision harness connector.
2. Shift the transmission into neutral.
3. Using an ohm meter, check for continuity between terminals a and c.
^Continuity should exist.
4. Shift the transmission into park.
5. Using an ohm meter, check for continuity between terminals a and c.
^Continuity should exist.
6. Shift the transmission into all other positions.
7. Using an ohm meter, check for continuity between terminals a and c.
^Continuity should NOT exist.
Replace the switch if it fails the above test.