2000 7.3 ford excursion 4 wheel gem

[Myrt]

4 wheel gem module on my 2000 ford excursion is out and am told part is obsolete...anyone have any idea on refurbished or any places to call besides salvage(already doing)....never dreamt I would not be able to buy ford parts for this vehicle..oh well

[Macgyver55]

They are available aftermarket and I see there are some used OEM Ford ones on the auction site.

What is the particular problem you are experiencing and are you confident its the GEM?

[Myrt]

mechanic told me that it was my gem module...not working. The vehicle will not transfer into 4 high when I turn the switch, they checked everything else, fluids, etc... local ford dealership knew nothing of any aftermarket, nor Ford Motor Company when I called them

[Macgyver55]

I see a couple different places online show an aftermarket one Part # 73-3047 for about 300 bucks.

Not sure what retailers you have to work with in Iowa but one of them should be able to come up with one.

[Myrt]

thanks for a place to start!!!! can you give me the online places you found? Thanks again!!!

[Macgyver55]

My buddy at Napa said they do not carry it, however both Advance Auto parts and O'reilly show it as being available, but neither one show it in stock.

[Myrt]

I think I've found it at autopart.....thanks for your help. I will find out tomorrow, nice to hopefully know I won't be driving a 2 wheel bus. ha

[Myrt]

interesting...the replacement part number 73-3047 actually represents the individual sending in their nonfunctional module and paying $318 for the 70% chance that this company can fix it....as per a phone call from Parts City asking on my behalf.....found a used one for $170...will try that...looks like other option would be last resort. wow

[Scott K]

Myrt, to be honest, I would back up and retest the gem before replacing it. I am not saying it isnt bad, I am just saying there are other things that are much more common then a gem going bad in this thing.

[Myrt]

ok...you're the second person who's told me that, can't hurt..thanks

[Scott K]

Here is the wiring diagram for it. I would go to the relays, with a test light, and check for powers where they show it, and grounds where they show it, then while some one is turning the 4x4 switch to 4x2/4x4 ck for the gem module applying a ground to the Brown/white ad the orange/Light Blue wires at the relay. The gem module will apply a ground to one or the other of them wires to activate the relay. The one grounded will depend on if you are switching from 4x2 to 4x4, or from 4x4 to 4x2.

To test the shift motor, remove the relays, jump a power wire to the big orange wire, and a ground wire to the big yellow wire, it will shift one direction. Swap the power and ground to the other wire, ground to orange, power to yellow and it should shift the other way.