I've pulled the CBJ and GEM out of my truck. There are obvious signs of corrosion and even visible moisture in the CBJ, the GEM looks ok. But if I can order everything for the same price, or close to it....

I was hoping I could just pull out the GEM and use the p/n to order a new one (ebay used) BUT......The GEM I pulled out of my truck says 4x2 right on it. I have an F250 Crewcab 4x4!

Every p/n on the thing comes back as a 4x2 GEM.

Now it gets really interesting. When I open up the GEM case, there is a differnt p/n on the PCB itself.

• GEM CASE p/n 1C3T-14B205-BC (This is the one that says 4x2 and comes back as a 4x2 p/n)
• GEM PCB p/n 1C3F-14A608-DB
• CBJ p/n 1C3T-14A067-AC - If it matters.

This is how my truck is currently equipped with regard to the GEM (I may miss a few options):

• Cruise (never worked)
• Interminint Wipers
• A/C
• Fog Lamps
• Manuel 4x4
• AM/FM CD
• Power Windows, Locks, Mirrors

What am I missing here? Is the 4x4 GEM used in SOTF 4x4 trucks only? Was this GEM reprogrammed, because that's big $$$.

 

I would pm Jefffafa he is the part number guy he works at an autonation ford dealership he helped me with a part number last week. Here’s a link to his profile page. I would have to assume the gem is different betweenthe electronic 4x4 trucks and the manual 4x4 truck since it doesn’t to the switching to 4x4 electrically
https://www.ford-trucks.com/forums/member.php?u=695521

 

That's perfect thank you.

I did some serious looking at the PCB on the GEM under magnification and there is no damage to it at all, so I turned my attention to the CBJ. The blades on the threaded connecters show some corrosion so I thought I'd open it up and look inside, actual water came out when I finally got the case open and there's mildew. The contacts INSIDE the CBJ are toast, I'll post photos later.

Buying a used CBJ off ebay, is going to produce the same results I'm sure. I'm going to be ordering new I think.

 

CJB ?

 

circuit junction box (block) = fuse panel

The plates sandwiched and running along the edge all have corrosion and even mildew. Moister was present as high as above the bolts. When I first separated the box about a tsp of water came out.