does anyone have a diagram or know that the different color wire going threw the firwall go to on a 1990-91 f350 had the 7.3L diesel i hooked the big yellow wire and big black wire to the battery and go the dinger, heater controls and the guage idiot lights

 

What is the problem? Did you lose all the power to the cab? If so check the connector on the passenger side fender well near the starting solinoid. The plug is a known source to corrode and lose power. It may even be discolored and melted. If you can't get it clean some have by-passed it and hooked the wires directly to each other. It will be the heavier wires in the plug IIRC.

 

94cummins12v welcome to FTE and the idi forum.
what happened to the truck exactly?is ratdhrum mean rathdrum idaho?

 

well basically nothing is hooked up i bought the truck with no motor in it so no idea were the wires go. i have a 500hp cummins 12v sitting in it right now just need to be wired there is a cupple wires cut but for the most part the harness is intact. i basically need to know what the different color wires go to so i can run new for all the engine components. yes rathdrum is rathdrum idaho

 

for an 89 underhood schematic:



For 90 engine compartment:

 

sweet that doesnt look like it shows all the wires that go threw the firewall for like all the sensors and stuff

 

so how exacty do i hook the batterys to the fuse panel? how do i hook the ignition up?

 

you should probably post a pic of whats in the truck as far as wiring, there should be a 10 space plug by the heater box with everything you need.

 

it should be similar to my wiring if you want to take a look.im actually in rathdrum quite a bit.my ole lady has family over there

 

oh right on i actually just moved up to spirit lake but i will be in rathdrum on tuesday and wednesday my phone number is 208-651-2377. i do have the plug near the heater but dont have the other end is it the plug that has like 10-12 pins?

 

ok here are som pitures i snapped im gunna try to eliminate the stratin selinoid cause the cummins has the selinoid on the starter. i would like to run new wires from the wiring harness going threw the firewall but here are the pics
http://i872.photobucket.com/albums/a...fummins/e3.jpg
http://i872.photobucket.com/albums/a...fummins/e2.jpg
http://i872.photobucket.com/albums/a...ummins/e22.jpg
http://i872.photobucket.com/albums/a...fummins/e1.jpg

 

The last pic is the engine harness plug that includes the wires to operate the glowplugs (Black heavy wires with white tracer), wire to energize the fuel shutoff which you could use on your cummins. The other plug in the pic that is just below the big plug is the vacuum warning light sensor. Let me see if I got another schematic.
this is mine:

 

I'd really try to incorporate using the stock harness upto the engine harness plug if it's possible, unless it's to late. Here's another 2 schematics

Fuse block:





This one will be most helpful.
Cluster:

 

so once i hook the batterys up to the starter seloid i should be able to have beter luck hooking stuff up?

 

Ford used the starting solinoid on the fender as a tap for anything they wanted hot at all times. If you look at a stock original Ford you'll notice all the wires attached to the one lug, this is why. So you have to start somewhere, it's one place to start.