Headlights randomly coming on?

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Feb 8, 2013 | 09:59 AM

#16

BillyBob69

Lead Driver

Joined: Jul 2003

Posts: 7,406

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From: Wheatland, Mo

If you do find that the GEM has gotten wet... Pull it, let it drain out any from the inside if it has any left..then bury it in a bowl of uncooked rice and tightly cover with saran wrap overnight. The rice will soak up any moisture in it. You may be able to save it. This I have seen a few times as well and it worked.

Feb 8, 2013 | 11:34 AM

#17

Yougotthehit

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Joined: Sep 2008

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Where is the Gem located? What does it stand for?

Feb 8, 2013 | 11:45 AM

#18

BillyBob69

Lead Driver

Joined: Jul 2003

Posts: 7,406

Likes: 52

From: Wheatland, Mo

It is located above the fuse panel under the dash.
If I remember right, GEM = Generic Electronic Module

Feb 8, 2013 | 12:16 PM

#19

Yougotthehit

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Does anyone have a pic of location and or of it?

Feb 8, 2013 | 02:47 PM

#20

BillyBob69

Lead Driver

Joined: Jul 2003

Posts: 7,406

Likes: 52

From: Wheatland, Mo

I dont have any pics but here are a couple of links that may help with descriptions. It can be a pain.
Hopefully someone else will pop in with pics.

Post #2 & 4
https://www.ford-trucks.com/forums/2...-location.html

Post #2
https://www.ford-trucks.com/forums/9...e-removal.html

Post #2
https://www.ford-trucks.com/forums/8...odule-gem.html

Jan 14, 2014 | 11:52 AM

#21

damons

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Joined: Aug 2009

Posts: 574

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From: Vader

Chiming in, I may have this issue, need to figure out as well where the GEM is, we have had heavy rains here recently. I did change the headlights recently, but I tried putting the old ones back in, same thing, stayed stuck on. Not sure if I should throw a new switch on there first and see or what.

Jan 14, 2014 | 11:57 AM

#22

BillyBob69

Lead Driver

Joined: Jul 2003

Posts: 7,406

Likes: 52

From: Wheatland, Mo

Quote:

Originally Posted by damons

The GEM is the little black box behind the fuse box under the dash.

Jan 14, 2014 | 05:00 PM

#23

whitetmw

Posting Guru

Joined: Oct 2008

Posts: 1,080

Likes: 10

Here is the revised wiring diagram. I would check the wiring first for corrosion at connections, closed to grounds, and insulation detrition. The Low Beams are on separate circuits. One thing you didn't mention is does it have DRL's? This adds a little to the mix because there is also an Exterior Lighting Module which, when malfunctioning can do the same.

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Jan 14, 2014 | 07:26 PM

#24

damons

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Joined: Aug 2009

Posts: 574

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From: Vader

Ok, it's probably not the headlight switch, plugged in new one, headlights are still on, they headlights are even on when switch is unplugged. We checked all known fuses.
Dead end....