Headlight Signal Circuit: Procedure
- INSPECT HEADLIGHT ASSEMBLY
- Check if the headlights come on when the light control switch is turned to the HEAD position.
OK
The headlights come on.
NG → See step 5
OK: Go to next step
- Check if the headlights come on when the light control switch is turned to the HEAD position.
- CHECK HARNESS AND CONNECTOR (HEADLIGHT SIGNAL)
- Disconnect the connector from the A/C amplifier.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition E9-23 (HLS) - Body ground Light control switch: OFF 11 to 14 V E9-23 (HLS) - Body ground Light control switch: HEAD Below 1 V TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to A/C Amplifier)
NG → See step 3
OK → See step 4
- CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - DAYTIME RUNNING LIGHT RELAY ASSEMBLY)
- Disconnect the connector from the daytime running light relay assembly.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition E9-23 (HLS) - E42-4 (H-LP) Always Below 1 Ω E9-23 (HLS) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 6
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- GO TO LIGHTING SYSTEM. Refer to PROBLEM SYMPTOMS TABLE
- REPLACE AIR CONDITIONING AMPLIFIER. Refer to REMOVAL