ahhhh, new thread time. First, I apollogize for all the somewhat off-topic replies i've been posting in other threads regarding my problem, but I REALLY appreciate all the help I've recieved so far (props to hornbm and Rex4Life). With that said, this is my problem so far:

I'm trying to put an 87 NA into my 83 GSL, and I've got everything down except the wiring harness swap. I've gotten alot of good info on what I need to do, but I'm still hitting a couple of rather big snags.

Now, what I need to know is, does the engine harness just plug into the EGI from the right side fire wall? (I still need to get a good engine harness so I am unable to look at one at this time)

Its nice knowing what wires go where from the EGI, but frankly, I'm not entirely sure what ones I need to keep for the engine to work. So far I know I need the entire engine harness, and part of the dash harness. I have plenty of diagrams of what wires are what, but I'm pretty lost as to how I wire it PROPERLY into my 1st gen. Do I have to splice and engine harness wires? Obviously I'm going to have to splice some dash harness wires, I just need to know what and where.

Thanks everyone
-Mike

 

im doing a TII swap and am going ot use the stock harness. so im in the same delema your in. from what i have asked and what i have read. i gather this much.

I have the WHOLE harness both sides, all the sensors, relays, every thing but the fuse box under the dash.

from what i gather. just run the lines, and hook up all the wires on the passenger side harness. its straight forward. just match the connectors,

then on the driverside one, you connect the spark, the alt, battery hook ups, and i think thats it, the rest of the wires controle, the head lights, dash, and other stuff not needed.

then you have to run a relay from the comp to the battery to give the CPU power at all times. (this is the part that confuses me, i dont know if its correct but this is what i have been told)

Items i believe are 100% nessisary for swap.

COMP
Wiring harness (full driver and passenger side incl. all relays sensors, and fuse box under hood)
AFM
trailing and leading coil packs

 

First off, if you don't need all the emissions stuff, you can probably cut down the wiring--although all these wires are on the engine harness which is really a plug and play deal--so it doesn't buy you much in reducing the wiring job. You will have to use the 2nd gen forum to research what not to install for emissions, I did a full install of everything--so I'm not much help in that area.

The big wiring job is doing the ECU#1 connector and the FEM-02 connector. The ECU#1 connector basically wires in through the front harness--not the dash harness. Most of these wires will have to run through the drivers side firewall--look at my breakdown to find out which ones go thru the firewall. Some just go to the FB X-07 connector by the FB ECU, some go to the FEM-02 (by the ECU), and some go to the dash area.

The engine harness will run exclusively through the passenger side firewall-the old one can be totally removed and is not needed. That's why it is a plug and play deal.

For stock ECU, count on connecting all the wires to the ECU that you see on the NA wiring diagram.

You don't need the FC fuse block under the dash. I added two fuses to my FB block--one 3 A for the ECU (battery circuit) and one 3 A for my new pillar gage sensor power (ignition on circuit). But I did steal the fuse block pins and wires from the FC front harness. In fact, I scavenged alot from that FC front harness. I had to untape it and separate the needed ECU wires from all the rest--half the job is just knowing which wires to pull out.

As far as the alternator wiring, I changed nothing. Used the FB wiring and the FC alternator--plug and play for my application.

I don't remember any wires that were to short.

The wiring diagrams I have will help you more than words. Coming soon.

Scott

 

cool, thanks scott, i look forward to those diagrams

 

oh yeah, keep in mind the mine is just a GSL, the ECU is on the drivers side, same as the engine harness... am i still gonna be able to run the new engine harness on the passenger side?

 

okay so lemme get this straight... can the spark, alt, and battery wires from the 87 ECU just be wired into the 1st gen wiring harness? can i keep the 1st gen ECU and hook up the sensor wires from the old harness onto the engine? what do i need to do to keep my gauges working?

thanks
mike