Preliminary Checks

Before checking the daytime running lamps system, do the following:
1. Place park brake in OFF position and ignition switch to RUN.
2. Verify condition of DRL, IGN/GAU and HTR A/C Fuses. If blown, locate and repair source of overload. Then replace fuse.
3. Place light switch in ON and headlamp dimmer switch in HIGH BEAM. If HIGH BEAM LAMP(S) DO NOT OPERATE (CANADIAN VEHICLES) Diagnostic procedures. Hi Beam Lamp(S) Do Not Operate
if HIGH BEAM headlamps operate, place light switch in OFF and use Diagnostic procedure. Diagnostic Tests