Zilverado Posted February 5, 2007 Share Posted February 5, 2007 (edited) So here's my first techincal post. I have posted this issue on another forum (sorry for the repeat for those who frequent both), but I thought this was another body of knowledge I could hit... Lately, we've been having an issue with the DRL's on our '92. The lights go on and off on their own. Since it even occurs when the vehicle is idling (not driving and bouncing around) I assume it's not simply a loose connection. I have had input that it is the light switch itself, so I played with things a little yesterday. Quick clarification - - according to the schematic I've seen, the daytime running lights appear to be part of the "high-beam" circuit, just with a lower power input - is this correct? Anyway, we were sitting in a car wash stall yesterday (bad idea at -30 C), and since I could see the reflection of the running lights well in the door ahead of me, I played around with the light switch a little. I turned the lights off and the running lights were "on". I flashed the high beams and after that the running lights were "off". Short time later, on they went again, then off, then on, then off.... and so on. So I wiggled on the switch lever to see if I could effect this lights at all, and NOTHING! I was not able to make the lights flicker on or off by "fooling" with the switch, they seemed to be on their own time. So, you still think I'm chasing a switch problem? If so, I assume I will need to hit a local dealer for this? And is it the entire switch - lever and all? Edited February 5, 2007 by Zilverado Link to comment Share on other sites More sharing options...
88pathoffroad Posted February 5, 2007 Share Posted February 5, 2007 The DRL modules like to cause problems, I've seen quite a few go out on people. Can you find one cheap locally at a junkyard, maybe? Link to comment Share on other sites More sharing options...
Zilverado Posted February 5, 2007 Author Share Posted February 5, 2007 That's kinda what I was thinking - - that's why I wanted a second (or third, or fourth...) opinion. I'll call around and see if I can find a module. Is there any way of testing these? BTW - nice site you guys got going here - - I assume you are at least partially to blame??? Link to comment Share on other sites More sharing options...
LD50 Posted February 5, 2007 Share Posted February 5, 2007 My DRL control module is toast too. I've taken it apart to try and find the weak link or cracked solder, but no luck. I think i'll end up forking over the $90 for a new one Link to comment Share on other sites More sharing options...
denisb Posted February 5, 2007 Share Posted February 5, 2007 Sounds like the DRL module. If you take the module apart you should see solder "cracks" if you will, when you wiggle the relays on the board. Just try re soldering all of the bigger connectors off the board and see if it helps. I fixed mine a couple of years ago and their still going but some people had less luck. Link to comment Share on other sites More sharing options...
Zilverado Posted February 5, 2007 Author Share Posted February 5, 2007 Excellent - thanks guys!!! Once things warm up here a bit, I'll pull it out of the vehicle and see if I can see anything. I am assuming the DRL module is located under the hood, passenger side, near the relay bank? Link to comment Share on other sites More sharing options...
Simon Posted February 5, 2007 Share Posted February 5, 2007 It's inside the inner passenger fender, right beside the battery. You'll see the mount for it there....undo the screws, and you can pull it out from the battery area. Link to comment Share on other sites More sharing options...
Zilverado Posted February 5, 2007 Author Share Posted February 5, 2007 It's inside the inner passenger fender, right beside the battery. You'll see the mount for it there....undo the screws, and you can pull it out from the battery area. Yeah, that's where it shows it in my Service Manual. So, does removing the module disable the headlights all together, or simply disable the DRLs. Link to comment Share on other sites More sharing options...
Simon Posted February 5, 2007 Share Posted February 5, 2007 It disables the lights altogether. So take it out, do whatever maintenance on the module that you need to, and put it back in.....or wire past it. Link to comment Share on other sites More sharing options...
Zilverado Posted February 5, 2007 Author Share Posted February 5, 2007 Thanks Man. Link to comment Share on other sites More sharing options...
syazoo Posted February 6, 2007 Share Posted February 6, 2007 (edited) So, how about does anyone know how to bypass the DRL? I can't quite see how to "wire past it". Mine has been giving me grief for two years. I have worked on the copper connections on the switch. I am sure my prob is the DLR. Edited February 6, 2007 by syazoo Link to comment Share on other sites More sharing options...
LD50 Posted February 6, 2007 Share Posted February 6, 2007 My lights "work" without the DRL module plugged in... strange thing is, the same light that is affected by the faulty module is the same one that doesnt work when the module is unplugged.... maybe a switch issue? I was able to give the fender by the module a whack and the lights would come on, so theres gotta be a crack somewhere. Since I have it apart, I'll re-flow some solder and check for hairline cracks. Link to comment Share on other sites More sharing options...
denisb Posted February 6, 2007 Share Posted February 6, 2007 I was able to give the fender by the module a whack and the lights would come on, so theres gotta be a crack somewhere. Since I have it apart, I'll re-flow some solder and check for hairline cracks. My guess is your exactly right. Sometimes it will be hard to see the cracks to the naked eye, with a magnifying glass or by trying to wiggle the relay, you might be able to notice the crack better or see the connector move inside the solder. Link to comment Share on other sites More sharing options...
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