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DLR module ???? DRL - daytime running lamps , doesn't have a DRL module. Why do you want to know that ? I see it coming , your going too replace it to see if it fixes the problem your having with the light's ? Without testing the circuit's . Do yourself a favor an take it to a qualified repair shop , before you make thing's worse .
Daytime Running Lamps (DRL)
The ambient light sensor is a light sensitive transistor that varies its signal to the body control module (BCM) in response to changes in the outside ambient light level. Any function or condition that turns ON the headlamps will cancel daytime running lamp (DRL) operation. With the headlamp switch in the OFF position, activating automatic lamp control (ALC), the front turn signal lamps will be turned ON after a 30-second delay under daylight conditions, which is determined by the ambient light sensor signal to the BCM. The DRL operates when the ignition switch is in the RUN position, the front wipers are not activated, and the transmission is not in PARK. When these conditions have been met and the ambient light sensor indicates daylight conditions, the BCM will illuminate the front turn signal lamps ON steady.
DTC B2645
Circuit Description
The body control module (BCM) monitors the daytime running lamps (DRL) ambient light sensor signal circuit in order to determine if the DRL or the headlamps should be turned ON in the automatic lamp control (ALC) mode. When the BCM senses the ambient light sensor voltage is between 1-4.9 volts, either the DRL or the headlamps will be commanded ON.
DTC B2645 Ambient Light Sensor Circuit
DRL relay ?
The daytime running lamps (DRL) lights are controlled by the body control module (BCM) via the DRL relay when the headlamp and panel dimmer switch is the AUTO position.
The relay is feed by the IGNE fuse when the ignition switch is in the run and crank position, (the coil side of the relay), and the DRL fuse which is hot at all times. The DRL relay is controlled by the BCM based on the input form the ambient light sensor via CKT 592.
The relay supplies current to the lights through CKT 545 and ground through CKT 150 and ground G100.
The DRL lights are on when the vehicle ignition switch is in the run position, park brake is not set, daylight conditions exists and the transmission has been in drive before placing in park. The DRL lights are turned off when the headlamp and panel dimmer switch is turned to the park or head position or the input to the BCM from the ambient light sensor signals that daylight conditions does not exists any more.
The automatic lamp control (ALC) system and the DRL feature can be temporarily disabled by performing the following procedure:
Note: The ALC and DRL cannot be turned off on the Canadian vehicles and some early production vehicles.
Turn the ignition to RUN.
Press the DOME OVERRIDE button four times within six seconds.
A chime will sound informing you that the system is off. The system will remain disabled until the ignition is cycled off and then on or by pressing the DOME OVERRIDE button four more times within six seconds. The chime will sound again signaling that the system has been reactivated.
If the brake lights are to american system ?? then maybe a new switch .If europeon system then ??? i would start looking at the wiring loom on the tailgate door to body in the rubber boot .
Do you have tail ligts and side marker lights with drls on? if so you will have only dim headlights. Check fuses, I think the headlights are fused seperately.
normal condition lamp sensor on top of instrument panel turns lamps on and off with lighting conditions when headlamps are on dash lights are on whwn drl,s are on dash lamps are off
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