D250 3/4 Ton Pickup 2WD V8-318 5.2L VIN Y FI (1988)
Clutch Switch: Testing and Inspection
Clutch (Inhibitor) Switch Test
Disconnect double connector at switch pigtail, then connect a 12 volt power source to either end of switch terminal.
Connect a test light to remaining terminal end and ground.
Test light should be on when pedal is in normal position and off when pedal is depressed.
If above step is not as specified, replace clutch switch.