Scary Situation with interior fuse box

[mikeg1652]

I had an eerie situation happen to me last night. At first my son noticed that the cargo lights were on for no apparent reason, so he called me down and i went to investigate. The doors weren't open, the illumination switch wasn't turned on, and i had no idea why they would be lit up. I also noticed that my door lights were on that illuminate the switches for the windows and locks. I sat there for a minute and looked up the fuse location for the cargo lights and all that stuff. The book shows it as location 14 for the cargo lights, so i pulled the fuse and nothing happened, they were still lit up. I put the fuse back in and other weird things started happening. My fuse box sounded like something was crackling, so that frightened me. It would happen, interior lights would turn on for no reason, and then it would stop and start again. Granted it was almost 10pm at night and close to 20 degrees, so i couldn't sit there and really identify the problem. I pulled fuses and nothing looked wrong, but I did disconnect the battery until i can look further. Anybody ever see this problem, or have some prior experience. Maybe my fuse box went bad, but other than that, I am lost. The truck has had no other issues, this just happened out of the blue.

E99 F250

[dhanna6powerstroke]

GEM module shorted out. It's mounted on the back side of the fuse box.

[dhanna6powerstroke]

If you pull the fuse box out and get to the module, check for corrosion. If corrosion is present, obviously replace the module but then you need to have the windshield checked for leaks because that's generally how the modules get wet.

[floorboy]

If they are all the same I have one from a previous fix that wasn't the problem. Make me an offer

[mikeg1652]

Originally Posted by dhanna6powerstroke

If you pull the fuse box out and get to the module, check for corrosion. If corrosion is present, obviously replace the module but then you need to have the windshield checked for leaks because that's generally how the modules get wet.

Thanks for the info, I will look into that. I tried getting the fuse block out last night to check for anything, but I couldn't find the secret passageway to get the darn thing out. This will be my project for the weekend. I don't think I have any leaks, but you never know, so maybe some Flex Seal is in my future

[dhanna6powerstroke]

Originally Posted by mikeg1652

Thanks for the info, I will look into that. I tried getting the fuse block out last night to check for anything, but I couldn't find the secret passageway to get the darn thing out. This will be my project for the weekend. I don't think I have any leaks, but you never know, so maybe some Flex Seal is in my future

Just take the 4 10mm bolts out and pull it out the front. May not have a leak, but if you're not the original owner, I would say it did at one point and has been fixed but took a while for the module to go bad.

[mikeg1652]

It is funny because my truck is kind of pieced together. The only original parts are the front fenders, frame, bed and powertrain. The cab is from a junkyard so i could see it possibly sitting there exposed. Thanks for all the info and i will let you know

[BSkopnik]

IIRC gems are truck specific for most part. It would have to be flashed for your truck. Father in law was having 4x4 issues on his 01 lariat. Turned out to be gem. Found out cant just grab any gem an slam it in, have to get a gem then get it flashed for the truck b


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[Fantom]

That I did not know.

[sixpack1]

Chck this site out. They deal with GEM modules and you can ask James questions to verify your problem. Ford GEM Modules Auto Parts Cheaper Blog