Headlight Signal Circuit

LIGHTING: LIGHTING SYSTEM: Headlight Signal Circuit

Headlight Signal Circuit

DESCRIPTION

The headlights are illuminated when the light control switch, located on the headlight dimmer switch, is turned to the HEAD position.
For models with the H-LP/AMT relay (sedan models equipped with the daytime running light system and all hatchback models), refer to Headlight Relay Circuit Headlight Relay Circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (H-LP RH/H-LP LO RH, H-LP LH/H-LP LO LH)
(a) Remove the H-LP RH/H-LP LO RH and H-LP LH/H-LP LO LH fuses from the engine room relay block.
(b) Measure the resistance.
Standard resistance:
Below 1 Ohms
(c) Reinstall the H-LP RH/H-LP LO RH and H-LP LH/H-LP LO LH fuses.
NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT BULB (HEADLIGHT BULB)

(a) Disconnect the B4 and B6 headlight connectors.
(b) Apply battery voltage to the terminals and check that the headlight illuminates.
Standard:

(c) Reconnect the headlight connectors.
NG -- REPLACE BULB
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (FUSE - HEADLIGHT)

(a) Disconnect the B4 and B6 headlight bulb connectors.
(b) Measure the voltage.
Standard voltage:

(c) Reconnect the headlight bulb connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT HEADLIGHT DIMMER SWITCH
(a) Remove the headlight dimmer switch.

(b) Inspect the light control switch.
(1) Measure the resistance.
Standard resistance:

(d) Reinstall the headlight dimmer switch.
NG -- REPLACE HEADLIGHT DIMMER SWITCH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (HEADLIGHT - HEADLIGHT DIMMER SWITCH)

(a) Disconnect the D4 headlight dimmer switch connector.
(b) Measure the voltage.
Standard voltage:

(c) Reconnect the headlight dimmer switch connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY GROUND)