Daytime running lights not working

DOUGGIE

MEMBER
2007 LINCOLN TOWN CAR
4.6L
V8
2WD
AUTOMATIC
280,000 MILES

My DRL's not working. Dealer supplied information is CM shared with some other system but would take computer diagnostic to identify. Fuse and distribution box lists do not specify the DRL location. Can you help with this id?

Thursday, June 15th, 2017 AT 3:38 AM

4 Replies

HMAC300

MECHANIC
48,601 POSTS

What the dealer is talking about is a CAN/BUS system evidently and it is not talking to another module like it should. Your car has a lighting control module that controls headlights, DRL, an d-fog lights. See picture for location replacing it may not fix the problem however.

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Thursday, June 15th, 2017 AT 5:42 AM

DOUGGIE

MEMBER
2 POSTS

Thanks for your information about the other system. Unfortunately the attached image is too small to view and I was unable to enlarge it for clarity. My owner's guide fuse/distribution lists only shows two fog lamp locations.

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Thursday, June 15th, 2017 AT 2:04 PM

HMAC300

MECHANIC
48,601 POSTS

I sent the module location which controls the DRL my mistake DRL are part of the headlamp assembly they can be the headlamp bulbs operating at low voltage, but probably will be another bulb next to headlamp fog lamps are usually in valance below head lamp.

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Thursday, June 15th, 2017 AT 4:01 PM

KEN L

MASTER CERTIFIED MECHANIC
47,624 POSTS

Hello,

Here are some wiring diagrams (below) and some guides to help you do some testing so you can get the problem fixed. It looks like there are more then one fuse running the system. See where the system is loosing power.

Click the image to enlarge

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-wiring

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken

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