[jsawduste]

That plug under the dash carries the wires to the gauges. But it also is the supply for the column mounted ignition switch. Down at the base of the column.

On the ignition switch you have a black and a blue multi terminal connector. This is powered from the PDC and through the plug in your picture. Not the bulkhead fuse box.

With your comments on wiring up other swaps you should know where to go next.

The fuel pump gets its power via the FP relay. With the ignition switch simply a switch for the relay. Again the plug in the picture.

Another issue is that the FP ground is tied into one of the two ring terminals mounted on the dipstick stud. One ring has a single wire while the other ring has two wires to a single ring. Those three wires and two rings account for all the grounds for the complete IP, ECM and engine. You can do a lot better here.

Make the engine crank and once that is happening see it the FP relay is getting tripped and sending voltage to the pump.

 

[jsawduste]

yea most of the swaps ive done are in gm. so i am new to this, i am going to put the oem under dash harness back in, ive searched and found out that there is a few wires you can swap around on the bulk head connector to get it to turn over... but i will also check into what your sayin.

The bulkhead uses GM Metri Pack terminals 280, 480 and 630`s. Take the blue and white locks out of the bulkhead and ten pry the tabs down like most GM terminals and they will pull right out.

What years are your engine/IP harnesses ? Both are YJ, correct ? 91-05 should be plug and play. If you are using the old 4.2 IP harness then there is a few to switch around.

The factory moved two wires for a recall on salt tracking. Which may or may not have been done. Other then that it ought to be plug and play. People make it a lot harder then it needs to be.

If you use the XJ harnesses then you have a few wires to move.

 

[jsawduste]

yea the motor and harness are 1994, the oem tub harness is 89, i swapped out the harness under the dash to 94, but due to nothing swapping over i am going to put the oem 89 one back in.

OR

Keep the 94 harness and run 91 and up OEM gauges.

OR

keep the 94 harness and run aftermarket gauges.

IMHO would be a better option.