Headlights keep blowing fuses

Tiny
TRUCKWES
  • MEMBER
  • 2004 MERCURY MARQUIS
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 79,000 MILES
I change the fuse and keep blowing every 3 days. Do lighting control module be bad?
Tuesday, April 6th, 2021 AT 4:36 AM

2 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
In short, yes it can. However we need to know which fuse keeps blowing just to find out what is on that circuit. Then we can narrow it down from there.

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

Here is the wiring diagram for the LCM that shows all these fuses but let me know if it something different. Thanks
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Wednesday, April 7th, 2021 AT 11:39 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,072 POSTS
It sounds like you have a lighting control module that is out. With the headlights on (fuse good) see if the module is warm. If so I would replace it. Here is the location of the lighting module and the headlight wiring diagrams so you can see how the system works. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Wednesday, April 7th, 2021 AT 11:41 AM

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