Have a 1999 escalade in shop with no headlamps, nor DRL's. Do have parking lights. Have seen that this is a reoccuring GM problem, but do not see cure. DLR relay is good, and hear it click, but power is not passed to leg the illuminates lights. Head lamps do not come on at all.
Country: United StatesMake: CadillacModel: EscaladeYear: 1999
Traced circuit through relay. No 12v itiated when headlamp swithch is turned on. Fuses good.
Could a bad DRL module cause both the DLR and regular headlamps not to work?
Hello, I'm Cam. Please include all the details about your issue so I can accurately advise you. I cannot see your vehicle so please be detailed.
First thing and honestly the most common,
take the trim off the column and check the wiring that runs up the drivers side to the headlight switch. These are bad for overheating, bad wires, corrosion and chaffing.
This indeed may be the area of the problem as it seems the column has been replaced in the past as I now see. Will continue to tear down and inspect. Am closing shop for day and will get back to you Mon.
OK, THis should take 5 mins to inspect if you want.
There does look like some chaffing. I will try to repair those wires and let you know. Thanks.
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Good idea. Also I forgot to mention that the PRNDL indicator light is also not working, could be in the same connector?
No, that I think may be a seperate issue.
It was wiring into the multifunction switch. I will accept now. How does the harness unplug from the multifunction switcch?? And any suggestions on the PDNDL light
THe harness is part of the switch, not stand alone so you need to replace the multifuntion switch assembly.
The PRNDL light can you check for a bulb behind it?
Ok, if not then the cluster has internal issues .
I have the cluster out. There really isn't a bulb for the PD.. indicator. The cluster illumination bulbs are all marked. I thought that the transmission signaled the PCM which in turn illuminated an internal led for that particular position.
OK, what exactly shows up in the PRNDL?
do they light up at all?
If you shine a flash light at it, can you see the LCD in the back?
Often if the back light is out you can still see the LCD inside working
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Took the face of the cluster and can see the little ports below the gear indicator letters. Shining light into those holes does not allow me to see the led's. Nor dese shinning the light into the printed circuit ribbon goinging behind cluster.
I woudl stil say the clsuter is out. YOu can confirm by watching the range in the vcm. Usually if the switch was out then it would show the PRNDL and not the line under it, not the whole thing out.
GM Grand Master Technician 2007. 11 years experience.