[1] – Park machine safely.
[2] – Disconnect wiring harness from switch.
[3] – Attach ohmmeter leads across the switch terminals (A).
[4] – Shift the transmission range to high or low.
– Range in gear position: no continuity
– Neutral position: continuity
[5] – If continuity is not correct, drain the transmission and remove switch.
[6] – Test switch continuity in OPEN and CLOSED positions.
– OPEN (plunger released): no continuity
– CLOSED (plunger depressed): continuity
Results
If any continuity is NOT correct, replace switch.
If continuity is correct with switch removed, but not with switch installed in transmission, see the power train repair Section 50.