Headlight Signal Circuit: Procedure

WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEADLIGHT ASSEMBLY
1. 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 4

OK: Go to next step

CHECK HARNESS AND CONNECTOR (HEADLIGHT SIGNAL)

Disconnect the connector from the A/C amplifier.

Fig 1: Identifying E30 Connector HLS Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
E30-27 (HLS) - Body ground	Light control switch: OFF	11 to 14 V
E30-27 (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 → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 3

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
GO TO LIGHTING SYSTEM. Refer to Headlight Relay Circuit