Dakota's are easy! Full size trucks are a different story. If you want a simple wiring harness with the full size truck, I recommend a Hot Wire harness, not cheap, but they work with connecting 4 wires. If the idea of digging through a factory wiring harness makes you nervous, I strongly suggest the Hot Wire harness. www.hotwireauto.com

With the early (90 & 91) Dakota, the EFI part of the harness is pretty easy to separate from the rest of the wiring (start at the computer and separate all the wires connected to it). The EFI is really a pretty much stand alone set up, you just need to split it apart. The 92-96 is a bit more inner connected, but you should still be able to separate the EFI from the other stuff. You will need to keep all the engine sensors and their wiring. it looks like a mess, but they are all grouped together. You will keep most of the motor harness intact.

The EFI computer is not connected to the instrument cluster other then providing the info the dash can supply to the driver, and none of that is required. There is nothing in the instrument cluster the computer needs for the EFI to function. You do need to keep all the motor sensors, the computer uses them. So if you are using a different oil pressure gauge, you will need to keep the computer one, and add a "T" to connect what ever you need for your OP gauge. The same thing with the water temp sending unit, you need to keep the computer sender, then add what ever you need to run your temp gauge.

The only thing the computer needs from the steering column is the ignition power through an ignition switch (what ever ignition switch you want to use). Everything else is simply someplace the factory hung stuff for the driver convenience.

The computer needs brake light switch input, and the electronic speedo (after 90 or 91) gets its info from the speed sensor on the trans, the computer also uses that info. I believe the 90 was the last year for the cable speedo drive, and it has the electronic switch added to the cable connection on the trans. You will need an electronic speedo on anything newer then 90, but you don't have to use the factory unit.

What I discovered the hard way is that everything under the dash on 91 and newer is ran through a dash black box. You will need that black box if you want to retain any original Dakota switches (like cruise) or gauges.

If you have any other questions, let me know. Gene