General Information

The DRL module does not operate if the system voltage is less than 9 volts or greater than 18 volts. The Daytime Running lamps (DRL) module is designed to automatically operate the front park/turn lamps and the low beam headlamps depending on the outside light conditions.

The DRL module operates in 2 modes:
^ The day mode
In the day mode, the DRL module turns on the low beam headlamps (at a reduced intensity) and the turn lamps when the DRL ambient light sensor detects daylight under the following conditions:
- The ignition switch is in the RUN position.
- The headlamp switch is off.
- The park brake switch is off.
^ The low light mode

In the low light mode, the DRL ambient light sensor detects darkness, turning on the low beam headlamps (to full intensity) and the turn lamps. Additionally, the DRL ambient light sensor turns on the following lamps:
- The tail/stop lamps (Chevrolet)
- The license lamps
- The tail lamps
- The park/turn lamps
- The tail/stop/turn lamps
- The side marker lamps

If the engine stalls with the DRL module in the low light mode, the DRL module turns off the low beam headlamps and the turn lamps while the engine is being cranked. The DRL module turns on the following lamps while the engine is being cranked:
^ The park/turn lamps
^ The side marker lamps
^ The license lamps The tail lamps
^ The tail/stop lamps (Chevrolet)
^ The tail/stop/turn lamps