Vehicles With Daytime Running Light Operation

1. Headlights don't come on.
a. But the tail lights do illuminate.
^ Check the headlight relay
^ Check the lighting switch.
b. The tail lights also don't illuminate.
^ Check the sub fusible link No. 4.

2. The low beam at both sides doesn't illuminate.
^ Check the daytime running light relay.

3. The upper beam at both sides doesn't illuminate.
a. The passing signal functions OK.
^ Check the "HI" contacts of the dimmer switch
b. The passing signal doesn't function.
^ Check the dimmer switch.
^ Check the daytime running light control unit.

4. One headlight doesn't illuminate.
^ Check the bulb.
5. Can't switch from low to high beam or vice versa.
^ Check the dimmer switch.

6. With the ignition switch at the "ON" position, the headlights' low beam does not illuminate.
^ Check the daytime running light control unit.

7. The high beam indicator light doesn't illuminate.
a. The high beam of the headlights is normal.
^ Check dedicated fuse No. 4.
^ Check the bulb.