A little help with 5.0 HO

[AkumaNoZeta]

Well, I bought a 1986 4 cylinder/5 speed Mercury Capri chassis for $300 to put all my Mustang parts in. Already got the 8.8 in it and currently working with the strut towers, modifying the older chassis for the newer struts. The wiring is kinda bothering me though, it's hard to find a good diagram for the 1990 5.0 HO harness.

 

Most of the engine has it's own harness, there's only one connector that goes into the body harness and it's an 8 pin with 5 wires coming out of it. I traced them the best I could but most went to other connectors that were already disconnected so I don't know what those were for, one went to the cruise control (removed), and another went to the ignition switch.

 

Would anyone happen to know where all 5 of these wires should go? I assume one goes to the electric pump in the tank but I don't know which one. The two ignition switches look different between the two cars and there's like 20 wires on each so I don't know which one that other wire should be spliced to.

[rags]

How about oil and water guages or idiot lights?

[AkumaNoZeta]

Well, here's the break down of what I have so far. I'm slightly color blind so the colors may not be too accurate.

Lt. Green/Yellow splints into two, one going to the ignition switch, the other to cruise control.

Pink/Black goes to fuel pump.

Pink going to gauge cluster (that must be the idiot light of course)

 

The last two are green/white and orange/yellow and goes to a small 8-pin connector that I don't know what went to.

[Tony D]

Why not boost the bejezuz out of the Ford Four.

 

Much as I hate to admit it, those little FF's can take a LOT. They had tons of factory development work...

 

I mean, a Mustang with a V8...zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz Huh?

 

 

The Ford Factory Manuals should have a pretty good breakdown...and a visit to your local dealer may reveal body harnesses were 'common' with a 'plug in' modular design depending on trim level. They like to do this. In many cases upgrades are simply a matter of getting the right power source and plugging in a factory subharness to the one already existing in the car.

 

But some of it...especially if you get a 'bare bones' model...some of that gets it's own special stripper stuff that doesn't go into ANYTHING else in the rest of the line. If that's the case, you're on your own...start running wires!

[AkumaNoZeta]

I've learned that there's quite a few differences between the 79-86 and 87-93 foxbodies. I didn't even know the struts were different, but I retrofitted the newer ones into the older chassis. I'm trying to spend the least amount of money possible on the car because in reality it's just going to be my new DD so I can spend a few years building up the Z. I got the rear body harness of the Mustang ready to get grafted to the Capri connectors since we're using the Mustang's hatch and tail lights. There were a lot of snipped wires under the hood of the Capri but given that all that's really needed there are the starter solenoid and headlight circuits it won't be hard to figure out.

 

We already gave the Mustang body to a buddy of ours who is planning to cut it up into a dirt track car of some sort so it won't be possible to see where that small 8 pin connector went to with the green/white and orange/yellow wires...I'm starting to think that maybe it went to the HVAC controls, but I don't know for sure. I think I may just need the three that go to the ignition switch, fuel pump, and gauge cluster. The engine and transmission are still out of the car so I still have plenty of time to figure it out.