1G 90 wiring harness in a 94 one plug difference

[cbr600teardrop]

I am swapping my 90 ecu and wiring harness in a 94 they are both gsx but i have ran into a problem one of the plugs are defrent and i dont know what they go to have looked at wiring diagrams and cant tell why they are defrent heres some pics the plug is near the ecu behind the radio they plug into the dash wiring harness here some pics to helphttp://www.dsmtuners.com/forums/attachment.php?attachmentid=93519&stc=1&d=1238703211





http://www.dsmtuners.com/forums/attachment.php?attachmentid=93520&stc=1&d=1238703211

 

[cbr600teardrop]

also the 94 has 11 wires and the 90 has 7 wires any help on what the other 4 wires do would be great .

 

[Jankenshank]

i have this same issue....

this is the only plug thats different..
i would like to know what the other wires go to/do?


im swapping a 90 engine & harness into a 91 chassis.

help would be appreciated.

 

[Jankenshank]

i still haven't figured out that the extra wires control/go to

i just transfered all but those four onto my 90 harness....

i guess if i have a problem thats the cause.

 

[MY1GDSM]

Why are you swapping the harness?
Also that's for the TCU and more to it then just the two plugs being differant TCU Giude >Click here<

 

[Stainbox12]

I did this swap a while back... i had a 90 engine harness and i swapped it for a good 91-94 one.. i had to splice wires inside the car. Basically, you just splice the wires that have the same colors on both harnesses and put it together. There would be some unused wires. No cel here, and its been like this for years. If you guys need any more help, let me know.

 

[MY1GDSM]

Was your car a 5spd or auto?

 

[Stainbox12]

1990 5 speed. Now its a 90 with a 91 harness and all its sensors.

 

[MY1GDSM]

Problem is that he's an Auto and trying to hook up an unknown(to us) TCU to an Unknown(to us) Auto Trans.

If he elaborates on what he's tiring to accomplish it would help alot...
But Being auto and the difference of of wiring to the Tcu and differant TCU's between different years its going to complicate it much more...

Tell he gives more info on what parts he's using from the different cars nobody is going to truly answers his questions...

 

[Jankenshank]

Problem is that he's an Auto and trying to hook up an unknown(to us) TCU to an Unknown(to us) Auto Trans.

If he elaborates on what he's tiring to accomplish it would help alot...
But Being auto and the difference of of wiring to the Tcu and differant TCU's between different years its going to complicate it much more...

Tell he gives more info on what parts he's using from the different cars nobody is going to truly answers his questions...

i had to switch shells so its a,

91 chassis harness to a 90 engine harness.

both manual trans harness, both AWD.

all connectors are the same on the engine harness except where the chassis harness and engine harness connect together at the ECU.

 

[FP3065TSI]

Would this affect the interior lighting of the car I have encountered this same problem. I hope someone can help....

 

[SBstar]

I have my 91+ harness hooked up exactly like Stainbox12 with zero issues, no lighting, no running,etc. As have several others. I am not familiar with the auto differences, but being those 4 wires were also extra in the 5 spd. I'm assuming they have nothing to do with the transmission. I would hook it up and give it a try. Make sure you get proper connections. There is also a different plug in the passenger side footwell, you can actually trim the connection to make it plug in and work, all wires should match up. I've been running my car for over two years like this.

 

[sniver]

I made a pin out for each connector .92 auto vs. 93manual. I'll have to copy it tomorrow. the auto has more wires for the cluster power/eco light, eco switch, and a/t temp light. Auto doesn't have the clutch switch wire.

The plug is a engine harness to body harness interface, and provides things like diag port, cel, turbo gauge.