Question about Cars & Trucks
Depends on what options your vehicle has - may have a daytime running lights module and a body control module, or just the body control module. You will need the service manual for repair information. Try Alldatadiy.com.
Posted on Apr 11, 2018
Doesn't have a headlamp control module . Has a headlamp relay , located in the instrument panel fuse box.
The headlamps may be turned on 2 different ways. First, when the driver places the headlamp switch in the ON position, for manual operation. Second, with the headlamp switch placed in the OFF position activating automatic lamp control (ALC).
The LH HDLP and RH HDLP fuse in the fuse block - underhood, supply battery positive voltage to both low and high beam lamps at all times. For manual operation, when the headlamp switch is in the ON position, the headlamp switch supplies ground directly to the headlamps and to the body control module (BCM) on the headlamp low or high beam signal circuit, depending on the position of the headlamp dimmer switch. The BCM uses this signal to determine if the conditions are present to illuminate the daytime running lamps or park lamps.
For ALC operation, the BCM receives a signal from the ambient light sensor indicating a low or high ambient, outside, light level. Under low light conditions the BCM grounds the headlamp relay control circuit energizing the headlamp control relay. The now closed relay supplies ground through the headlamp switch to the headlamps and the BCM on the headlamp low or high beam signal circuit, depending on the position of the headlamp dimmer switch. When the BCM grounds the headlamp relay control circuit it also grounds the park lamp relay control circuit illuminating the park lamps. The headlamp relay is grounded at G203.
If the engine stalls with the headlamps in the ALC mode under low light conditions, the headlamps will be controlled OFF during cranking.
The conditions necessary for the BCM to activate the ALC mode are as follows:
• The ignition switch is in the RUN position.
• The headlamps are in the OFF position.
• The park brake is released. If the park brake is applied after the ignition key is placed in the RUN position the ALC is not effected.
Posted on Apr 11, 2018
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Posted on Jan 02, 2017
open the hood, on the top of the assembly, there should be a bar/rod on each side. simply remove them and the assembly should slide right out
Posted on Jun 20, 2009
The LCM or lighting control module is located under the dash to the right of the steering wheel, first you need to remove the hush panel under the knee brace, then there are 2 screws the hold it to a bracket. Unplug the 4 connectors towards the back and then slide it out and replace.
Posted on Oct 22, 2009
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