Supra Sport Roof L6-2997cc 3.0L DOHC MFI (1998)
Headlamp Control Module: Description and Operation
With the ignition SW turned ON, the current flows to TERMINAL 7 of the integration relay through GAUGE fuse.
Voltage is applied at all times to TERMINAL (A) 2 of the integration relay through the taillight relay coil side, and to TERMINAL (A) 3 through the
headlight relay coil side.
1. NORMAL LIGHTING OPERATION
Turn taillight on
With the light control SW turned to TAIL position, a signal is input into TERMINAL (A) 1 of the integration relay. Due to this signal, the
current flowing to TERMINAL (A) 2 of the relay flows to TERMINAL (A) 1 to TERMINAL 14 of the light control SW to TERMINAL
16 to GROUND, and taillight relay causes taillights to turn ON.
Turn headlight on
With the light control SW turned to HEAD position, a signal is input into TERMINALS (A) 1 and (A) 4 of the integration relay. Due to this
signal, the current flowing to TERMINAL (A) 3 of the relay flows to TERMINAL (A) 4 to TERMINAL 13 of the light control SW to
TERMINAL 16 to GROUND in the headlight circuit, and causes taillight and headlight relay to turn the lights ON. The taillight circuit is
same as above,
2. LIGHT AUTO TURN OFF OPERATION
With light ON and ignition SW turned OFF (Input signal goes to TERMINAL 7 of the relay), when the LH door is opened (Input signal goes to
TERMINAL 6 of the relay), the relay operates and the current is cut of which flows from TERMINAL (A) 2 of the relay to TERMINAL (A) 1
in taillight circuit and from TERMINAL (A) 3 to TERMINAL (A) 4 in headlight circuit.
As a result, all lights are turned of automatically.
