Headlights Always On
05-03-2022, 01:08 PM
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Headlights Always On Hey everyone I have a 98 camaro and as the title explains, my auto headlights are malfunctioning and are always on, even during the day. Some things I've tried replacing include the ambient light sensor in the dash (replaced with GM 12450120), and I replaced the DRL module behind the dash with one from a firebird from a junkyard and I am still having the issue.
The original sensor's part number for the light sensor was GM 10261143, and that part is discontinued. 12450120 is a proper replacement correct? And would using a firebirds DRL module matter in a camaro?
I don't want to cut any wires and bypass the auto headlights preferably, and want to solve the issue. I have run out of ideas on what could be causing this and any help would be appreciated.
The original sensor's part number for the light sensor was GM 10261143, and that part is discontinued. 12450120 is a proper replacement correct? And would using a firebirds DRL module matter in a camaro?
I don't want to cut any wires and bypass the auto headlights preferably, and want to solve the issue. I have run out of ideas on what could be causing this and any help would be appreciated.
05-03-2022, 04:41 PM
#2
The Firebird and Camaro DRL modules are the same (10407669). In the US, Firebirds don't have automatic headlights but the difference is in the wiring not the module... Firebirds have the two light sensor wires shorted together to simulate daylight all the time so the headlights only turn on using the switch.
The module determines darkness by resistance from the sensor. No resistance means bright light and infinite resistance (open circuit) means darkness. It sounds like you have a break in one or both of the two sensor wires causing it to think it's dark all the time.
The module determines darkness by resistance from the sensor. No resistance means bright light and infinite resistance (open circuit) means darkness. It sounds like you have a break in one or both of the two sensor wires causing it to think it's dark all the time.