Previa Van LE 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
Headlamp Control Module: Description and Operation
With the ignition SW turned ON, the current flows to TERMINAL 9 of the light retainer relay through the GAUGE fuse, voltage is applied at all times
to TERMINAL 5 of the light retainer relay through the tail relay coil, and to TERMINAL 6 of the light retainer relay through the head relay coil.
1. NORMAL LIGHTING OPERATION
<Turn Taillight ON>
With light control SW turned to TAIL position, a signal is input to TERMINAL 13 of the light retainer relay. Due to this signal, the current
flowing to TERMINAL 5 of the relay flows to TERMINAL 13 --> TERMINAL 2 of the light control SW --> TERMINAL 11 --> to
GROUND and taillight relay causes taillight to turn ON.
<Turn Headlight ON>
With light control SW turned to HEAD position, a signal is input to TERMINAL 14 of the light retainer relay. Due to this signal, the current
flowing to TERMINAL 6 of the relay flows to TERMINAL 14 --> TERMINAL 13 of the light control SW --> TERMINAL 11 --> to
GROUND in the headlight circuit, and causes tail and head relay to turn the light ON. The taillight circuit is same as above.
2. LIGHT AUTO TURN OFF OPERATION
With lights ON and ignition SW turned OFF (input signal goes to TERMINAL 9 of the relay), when door on driver's side is opened (input signal
goes to TERMINAL 11 of the relay), the relay operates and the current flowing from TERMINAL 5 of the relay to TERMINAL 13 in taillight
circuit and from TERMINAL 6 to TERMINAL 14 in headlight circuit is cut OFF. As a result, all lights are turned OFF automatically.
