Tacoma Regular Cab 4WD L4-2.7L (3RZ-FE) (1999)
through the TAIL fuse.
LIGHT REMINDER SYSTEM
When the light control SW is in TAIL or HEAD position and the driver's door is opened (Door courtesy SW ON), as a result, the relay is
activated and current flows from TERMINAL 4 of the relay to TERMINAL (A) 5 to TERMINAL 1 of the door courtesy SW LH to GROUND,
sounding the light reminder buzzer.