Preliminary Checks

Before checking the Daytime Running Lamps system, do the following:
1. Place Park Brake in OFF position and Ignition Switch in RUN.
2. Verify condition of DRL, GAGES, TAIL LPS, FOG LPS and HTR A/C Fuse(s). If blown, locate and repair source of overload. Replace Fuse(s).
3. Place Light Switch in ON and Headlamp Dimmer Switch in HIGH BEAM. If HIGH BEAM headlamp(s) are inoperative, refer to HIGH BEAM LAMP(S) DO NOT OPERATE Diagnostic Charts.

If HIGH BEAM headlamps operate, place Light Switch in OFF and use the following diagnostic procedure.
1. Check condition of FOG LPS and TAIL LPS Fuse(s). If fuse is blown. locate and repair source of overload. Replace fuse.
2. If fuse is not blown, proceed with Diagnostic Charts.