Calgary Jeep Association
4x4 Related Groups => Tech Talk => Topic started by: RUBI on August 14, 2008, 08:14:49 PM
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Anybody got a fix to ditch the DRLs ??? ( Daytime Running Lights) ..........I had my off road lights set up to come on with the High Beams, but DRL module screwed two sets of relays on me. >:(.
These are also a pain in the A$$ come hunting season :-\
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Wanna look at wiring diagrams? I have factory service manual for '04 TJs... can probably figure out something to bypass them/disable them (that's what we do on the police cars) or to make the accessory lights work only when the *real* high beams are on!
Pat
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Iv'e got a service manual for mine as well.......I did manage to find this online
Jeep
Jeep TJ (2003). Many people disable DRLs (daytime running lights) by unplugging the module itself. This works but will usually disable some other aspect such as your high beam indicator. The Jeep TJ (mine is a 2003 Sahara) uses a motion sensor to send a signal to the DRL module to tell it the Jeep is moving and to activate the daytime running lights. To defeat this, you need to open the cable assembly leading into the DRL and find the wire which is coded WHITE/ORANGE and cut this wire so that the motion signal never reaches the DRL and the lights stay off until YOU want them by YOUR choice. There are no adverse effects whatever; everything else continues to work properly. I went a step further since I do want them on if I am on the highway for a long trip. I cut the wire and connected the two ends of this wire to a switch which is fixed under the hood. One position is DRL ON, the other is DRL OFF. I don't know what years or models this will work for but I suspect it would work for many situations.
Jeep TJ (1997+). (Possibly superceded by above.) Manufactured in Canada come equipped with dim DRL's. To disable them, you need to unplug the control module that operates them. Its located on the firewall under the hood, drivers side; Its about the size of a beeper (pager) Unplug it and make sure it dosen't dangle down onto the engine. The only side effect I have noticed is, the high beam indicator that tells you that your bright lights are on, doesn't work. But who really needs that anyway!!!!
Jeep Grand Cherokee, Auto ON lights. Lift out the dash defroster grill and open up the 3/16" hole (left center) to 3/8" and your lights will come on just after sunset instead of the middle of the afternoon.
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Here's the one best thing you can do to disable DRL's....(I do not make any safety claims with this, nor do I endorse doing this for safety reasons).
On the DRL module, find the wire that is for the ignition sense, ie: it will have 12v to it when the ignition is turned on. Cut this wire. This way your lights will continue to operate but without the DRL's. The module essentially thinks that the ignition is not turned on, but the lights will still be able to be turned on/off as normal.
Just an FYI, one of the biggest causes of DRL module failure is the use of brighter bulbs than what came stock (ie: 100W Hyperblue's highbeams compared to 70W stock bulbs). Alot of DRL modules actually pulse the light, so extra draw from a larger filament can mess with them pretty good.
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Dark Blue with Orange stripe...........(snip) no more DRLs !!!! ;)