Daytime Running Lamps (DRL) - Domestic

The Daytime Running Lamps (DRL) are the front turn signals. The front turn signals are designed to automatically illuminate under the following conditions:
^ The ignition switch is in the RUN position.
^ The headlamps are OFF.
^ The park brake is OFF (released).
^ The RH or LH turn signal is OFF.

The DRL control module will not operate the daytime running lamps, if the park brake is applied before the ignition switch is turned to the RUN position. This allows the driver to start the vehicle and keep the daytime running lamps OFF, as long as the park brake is applied. The DRL control module will activate the daytime running lamps when the park brake is released with the ignition switch in the RUN position.

This feature functions only when the park brake is applied before the ignition switch is turned to the RUN position.

When the turn signal switch place in either the LH or RH position, pulsating voltage is supplied to the DRL control module. The DRL control module senses the voltage and disengages the DRL function of the appropriate front turn signals. The DRL control module then relays the turn signal voltage to the front turn signal and the front turn signal will flash.

The daytime running lamp (DRL) control module for the Pontiac is the same DRL control module that is used for the Chevrolet Domestic. The associated wiring is also the same as the Chevrolet Domestic with the exception of the elimination of the ambient light sensor. The ambient light sensor circuits are present but, the ambient light sensor is replaced by a jumper. The jumper simulates the state of an ambient light sensor in daytime conditions. When the DRL module receives this signal it will turn on the daytime running lamps (DRL). For more information on the DRL control module operation refer to Daytime Running Lamps (DRL) Chevrolet Domestic, Gulf, Pontiac Canadian.