Tacoma PreRunner Reg Cab 2WD L4-2.7L (3RZ-FE) (1999)
Interior Light Switch: Testing and Inspection
INSPECT ROOM LIGHT SWITCH CONTINUITY
a. Disconnect the connector from room light switch.
b. Turn the room light switch ON, check that continuity exists between terminal 2 and body ground.
c. Turn the room light switch to DOOR, check that there is continuity between terminals 1 and 2.
If operation is not as specified, replace the switch.