battery drain tracked down to gem module
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Senior User
Joined: Mar 2010
Posts: 339
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From: Madison, Mississippi
battery drain tracked down to gem module
quick question/ battery drain tracked down to fuse 19 gem module....see that it controls 4x4 esof among other things.. should I track down wiring at gem for possible ground and 4x4 shift button ect and any other controls for the gem module? Have a door ajar light on as well/ as for programming can any auto/ truck shop program this? any help to troubleshoot further on it would be of great help!
2002 ford excursion limited 4x4 diesel
2002 ford excursion limited 4x4 diesel
Junior User
Joined: Nov 2012
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From: Knoxville, TN
Pretty sure only the dealer can program these, unless of course the shop is a ford specialty shop with the required program. All they do is type in your VIN and pull a build sheet from the database for everything that your GEM needs to control and pass it on to the GEM.
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Joined: Nov 2012
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From: Knoxville, TN
No, you won't have headlights, blinkers, windows won't work, locks won't work, no wipers, no 4x4. Anything like that (anything in your cab that is run by an electrical circuit is run through there) is controlled by the GEM.
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Senior User
Joined: Mar 2010
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From: Madison, Mississippi
hummm kept that fuse out and checked/ lights wipers windows work but no door locks truck cranks up ok.....will double check again with voltmeter at 19....its got an after market bulldog autostart/security module hookedup but i dont use it / also truck was broken into few years ago and had a aftermarket dvd player put in but all the fuses pulled i was at 5 amps down to like .31 after pulling fuse 19 / its keyless and door combination model wondering wth is going on....delaying the inevitable ( hope not) probably just dive in and see what i see...
Post Fiend
Joined: Sep 2003
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From: Mesa AZ
I believe so. I didn't think any of the '02-'03 models came with a GEM. 
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Junior User
Joined: Nov 2012
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From: Knoxville, TN
Ahh yeah didn't pay attention to that. 2002 has three different units (insturment cluster, VSM, and a 4x4 module) instead of the one GEM. I thought you meant take the whole thing out and run it. Yeah just leave that fuse out and all should be good except for whatever that fuse controls.
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