Question about Cars & Trucks
When driving in daylight and the car goes into "darkness", as in going under an underpass, the entire lighting system, including headlights and panel lights, goes haywire. In fact I can make this occur by covering the photodiode with the palm of my hand. What's gone wrong?
The ambient light sensor connects to the body control module. In other cases of strange things happening, replacement of the BCM seems to be the solution. Might work in your case
Posted on Dec 09, 2012
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Posted on Jan 02, 2017
SOURCE: DRL-1998 Cavalier Z24
Check your DRL relay that is located in the fuse box. Also check the connector under the battery box for corrosion. (Not a smart place to put a connector) GM really messed up with the wiring on the 98-00 cavaliers headlights.
Posted on Nov 01, 2008
Most DRL's are controlled by a relay. The relay malfunctions after a while. Need to go to the dealer and purchase a DRL relay. Once you see what it looks like open hood and match it to the bad one, then replace. If you can not locate it the library has mechanical books for you make and model to look up location of the drl relay.
Posted on Jan 19, 2009
THE SPEED SENSOR IS LOCATED INSIDE THE HUB ASSEMBLY. THE TWISTED WIRES GOING TO THE SENSORS ARE PROBABLY AT FAULT. THE WHEEL SPEED SENSOR HARNESSES ARE AVAILABLE THROUGH A DEALERSHIP.
Posted on May 24, 2009
Start by setting your auto headlight switch to off if this solves it replace your headlight switch If your car is equipped with daytime running lights there could be a short bridging them with your auto head lights look for broken or frayed wires do this also if you have installed or had someone install an aftermarket stereo or speakers/sub woofer, amplifier. Good Luck with this
Posted on Jul 09, 2009
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Aug 17, 2017 | Cars & Trucks
Nov 01, 2016 | Cars & Trucks
The ambient light sensor indicates daylight.
The vehicle is not in the PARK position.
When the above conditions are met, the lamp control module (LCM) supplies battery positive voltage (B+) to the low beam headlamps through CKT 589 (GRY), the DRL resistor, and CKT 12 (TAN). The DRL resistor reduces the voltage supplied by the LCM. The low beam headlamps light at a reduced intensity. The DRL disable if the vehicle is placed in the PARK position. When the ambient light sensor indicates darkness, the low beam headlamps automatically switch from a reduced intensity to a regular intensity.
Lamp Control Module (LCM)
In the center of the IP, below the center heater outlets
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