Headlight Doors

Troubleshooting Hints

^ HEADLIGHT DOOR stops partly open or partly closed:

NOTICE: Disconnect the actuator plugs before any adjustment of headlight door linkage is attempted.

- Check the door linkage for binding or damage.
^ The RH and LH DOOR ACTUATORS contain torque-operated limit switches. The mechanical load when the HEADLIGHT DOOR is fully open or fully closed operates the switches to shut off the motor. Any other high torque load can cause the motor to stop before the end of travel. Be sure to reconnect the linkage before operating headlights, so that the limit switches can shut off the actuator.

^ Both HEADLIGHT DOORS stay closed when the HEADLIGHTS are turned on:

- Check that the HIGH BEAM INDICATOR comes on when the LIGHT SWITCH is turned to the "Head" position and the DIMMER SWITCH is operated.
^ If the indicator doesn't come on, check the LIGHT SWITCH, the YEL wire and the feed to the LIGHT SWITCH (see Power Distribution).
^ If the indicator comes on, unscrew the two ISOLATION RELAY mounting screws and check for voltage at the ISOLATION RELAY YEL wire with the LIGHT SWITCH in the "Head" position:

- If no voltage appeared, check and repair the YEL wire.

- If voltage appeared, check for voltage between the ISOLATION RELAY YEL wire (plus) and the BLK wire (minus). If voltage appeared, replace the ISOLATION RELAY. If no voltage appeared, check and repair the BLK wire from the ISOLATION RELAY to ground G104.

^ HEADLIGHT DOORS stay open and HEADLIGHTS stay on when LIGHT SWITCH is moved to "Off":

- Move LIGHT SWITCH to "Park" position. If HEADLIGHTS turn off and HEADLIGHT DOORS close, replace the ISOLATION RELAY (internal diode has shorted).

^ Both HEADLIGHT DOORS stay open but HEADLIGHTS go out when the LIGHT SWITCH is in "Off":

- Check the LIGHT SWITCH and TAIL FUSE by operating the parking lights.
^ If the TAIL FUSE was blown, set SWITCH to "Off" and replace the fuse. If the doors close, move the LIGHT SWITCH to "Head" and quickly return it to "Off." If the doors don't close, replace the ISOLATION RELAY (the internal diode is shorted).
^ If LIGHT SWITCH and TML FUSE are OK, unscrew the two ISOLATION RELAY mounting screws and check for battery voltage at ISOLATION RELAY WHT wire.

- If there is no voltage, check and repair WHT wire.

^ One HEADLIGHT DOOR stays closed with the HEADLIGHTS on:

- Check if the HEADLIGHT DOOR moves when the LIGHT SWITCH is moved from "Off" to "Head" and back to "Off."
^ If slight motion occurs, check the door linkage for binding or damage.
^ If no motion occurs, set the LIGHT SWITCH to "Head" and check for battery voltage at the (LH or RH) ACTUATOR RELAY GRN wire.

- If voltage was present, check for battery voltage between the ACTUATOR RELAY GRN wire (plus) and GRY wire (minus). If voltage appeared, replace the ACTUATOR. If no voltage appeared, replace the (LH or RH) ACTUATOR RELAY.

- If no voltage was present, check for battery voltage at the ACTUATOR PNK wire. If no voltage, check and repair the PNK wire. If voltage appeared, check for battery voltage between the ACTUATOR RELAY PNK wire (plus) and BLK wire (minus). If voltage appeared, replace the ACTUATOR RELAY. If no voltage, check and repair the BLK wire between the ACTUATOR RELAY and ground.