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DRL module location needed

Tiny
STEVE W.
  • MECHANIC
  • 13,476 POSTS
The relay they reference is for a DRL equipped model. Yours has autolamps but no DRL so the control relays are part of the LCM, unless there is a DRL unit wired in someplace else or a jumper wire to power up the headlights when you start the engine.
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Friday, April 20th, 2018 AT 7:31 PM
Tiny
REX STERLING
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  • 21 POSTS
Yes I do have auto-lamps, but my lights should not stay on all of the time. They stay on even when the light switch is in the off position, and also when the key is is the accessory position. I am more confused than ever now. I removed the low beam fuses (fuses 24 and 26) and still had the passenger side headlight on rather dimly ( like the DTR lights are supposed to be) any time the key is not in the off position. I still could turn on my high beams. Then I also took out fuse #27 (LCM for cornering lamps and high beams). The left passenger headlight still stayed on dimly, but had no high beams. Very confusing.
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Friday, April 20th, 2018 AT 11:57 PM
Tiny
STEVE W.
  • MECHANIC
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Did you buy this car new? Was it doing this before they replaced the LCM?
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Saturday, April 21st, 2018 AT 12:45 AM
Tiny
REX STERLING
  • MEMBER
  • 21 POSTS
I just purchased the car and yes it had the problem of not being able to turn off the lights before and after the LCM was replaced. Replacing the LCM did give me high beams though. Before that I could only flash them. Thanks.
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Saturday, April 21st, 2018 AT 9:24 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,476 POSTS
Okay, then it is more than likely something added on. Do the lights come on if you just turn the ignition on? Do they go out when you turn the key to start it, then come back on?
It does not take much to do that, you just use a wire from a switched power feed, a relay and a wire feeding the headlights. The trick will be to find it.
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Sunday, April 22nd, 2018 AT 5:39 PM
Tiny
REX STERLING
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Yes the lights come on as soon as the key is in any position except off. (ON or ACC). They stay on all of the time until the Ignition is put into the off position. They stay on when the car is starting, when it is just sitting in park even with the parking brake on. The only way to turn them off is by turning off the ignition. I tried removing the two low beam fuses and then I only had the passenger side headlight on at a lower output (like a DTR light should be) all of the time. Removing the high beam/cornering light fuse made no difference. It is really confusing.
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Monday, April 23rd, 2018 AT 8:27 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,476 POSTS
I was reading the recall on this. You had this issue before they replaced the LCM. The recall was because the LCM would fail resulting in no lights. I wonder if the previous owner had the unit fail and added a wire to turn the low beams on because the LCM was deemed too expensive or possibly the parts were not available? That would explain not having the high beams working as the LCM failure only shut off the headlights, the rest of the system still worked.

If you switch the lights on with the light switch do the high and low beams switch correctly or do the low beams still stay on when you select the high beams?
When you turn on the key it is only the low beam lights that come on correct, or can you switch low/high?

I attached a different version of the wiring diagram and the LCM circuit.
We will figure this out.
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Tuesday, April 24th, 2018 AT 12:57 PM
Tiny
REX STERLING
  • MEMBER
  • 21 POSTS
What you said in the first paragraph of your response makes a lot of sense to me. If I switch the lights on with a light switch the low beams come on but I can change them to high beams. When I turn the key on the low beams come on but I can switch them to high beams.

I cannot read the two wiring diagrams even when I put on the magnifier. I will search for any suspicious looking wires under the dash or the hood tomorrow that could have been added. Thank you very much.
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Tuesday, April 24th, 2018 AT 6:59 PM
Tiny
REX STERLING
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  • 21 POSTS
I figured out a way to make the diagrams readable. It might help me find any added wires.
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Tuesday, April 24th, 2018 AT 7:51 PM
Tiny
STEVE W.
  • MECHANIC
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I have seen things like that on different vehicles, some item fails and gets "repaired" in a way that drives the next guy crazy. The police option on that car eliminates the light sensor and turns on all of the lights as soon as the key goes to accessory or on.

On the diagram, if you right click it and select to open it in a different window it should come up with a zoom button to make it larger.
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Wednesday, April 25th, 2018 AT 11:34 AM
Tiny
REX STERLING
  • MEMBER
  • 21 POSTS
Thank you Steve. My lights work fine now. I found the extra wire that the previous owner had run to the headlights and disconnected it (and protected the end of the jumper from shorting out). Your advice saved me a lot of misery and possibly expense. Once I found the wire, I felt silly that I had not seen it before. This problem was driving me nuts. Thanks again for all of your time and effort on this and for not just giving up. You are the best.
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Wednesday, April 25th, 2018 AT 11:58 AM
Tiny
REX STERLING
  • MEMBER
  • 21 POSTS
PS: I do not have DRL's on this car, which is fine with me.
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Wednesday, April 25th, 2018 AT 12:26 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,476 POSTS
Great to hear you found it. You are welcome for whatever help I provided.
Thank you for using 2CarPros. Com, return anytime with your automotive questions.
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Wednesday, April 25th, 2018 AT 10:45 PM
Tiny
REX STERLING
  • MEMBER
  • 21 POSTS
Thanks. Your help was very beneficial. I am really glad that I discovered 2carpros. Com.
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Wednesday, April 25th, 2018 AT 11:13 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Steve W is one of our best!

Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken
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Saturday, April 28th, 2018 AT 10:34 AM
Tiny
BLOOMSAM
  • MEMBER
  • 1 POST
Day running light has it own personal module which is the DRL relay. This relay is trigger by the ECM module, but the beautiful thing is it can be disconnected. The DRL relay is locate under the dash both left and right side, also inside the gear selector house in some models. So you will need to loose the entire gear selector plastic housing beside the driver
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Monday, October 21st, 2019 AT 2:04 PM
Tiny
STEVE W.
  • MECHANIC
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Thank you for that information. In this case no DRL's on the vehicle.
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Monday, October 21st, 2019 AT 10:15 PM

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