Montero V6-3.8L SOHC (2005)
STEP 5. Check the wiring harness between front-ECU connector A-07X (terminals 3 and 4) and the battery.
Q: Is the wiring harness between front-ECU connector A-07X (terminals 3 and 4) and the battery in good condition?
YES: No action is necessary and testing is complete.
NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the
connector. Repair the wiring harness as necessary. Verify that the headlights (low-beam) illuminate normally.
Inspection Procedure J-3
Headlight and Taillight: Headlights (high-beam) do not illuminate.
Headlight Relay (Low-beam) Circuit
CIRCUIT OPERATION
When the dimmer switch is turned on, the column switch sends any signal to the front-ECU. Then the front-ECU switches the headlights from low-beam
to high beam or vice versa.
TECHNICAL DESCRIPTION (COMMENT)
If the headlights (high-beam) do not illuminate normally, the column switch or the front-ECU may be defective.
