T100 Extra Cab Pickup 2WD V6-3.4L (5VZ-FE) (1998)
Door Switch: Testing and Inspection
INSPECT DOOR COURTESY SWITCH CONTINUITY
a. Check that there is no continuity between terminal and the switch body in the ON position (switch pin released opened door).
b. Check that there is continuity between terminal and the switch body in the OFF position (switch pin pushed in closed door).
If/ operation is not as specified, replace the switch.