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Old 12-27-2010, 07:15 PM   #1
waypastcrazy
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95 to 89 wiring question

Will 95 v8 wiring harness and ecm work in a 89 coupe without bunch of splicing.thx
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Old 12-27-2010, 07:34 PM   #2
EHardy1971
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Quote:
Originally Posted by waypastcrazy View Post
Will 95 v8 wiring harness and ecm work in a 89 coupe without bunch of splicing.thx
Honestly Clyde, it's a LOT more trouble than it's worth. The SN95 harness and EEC is a completely different deal than the Fox setup. It will be nothing but a headache, and a LOT of splicing work. Not to mention the SN95 EEC has the transmission funtions built into it as well, where the older Fox EEC's don't.
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Old 12-27-2010, 08:11 PM   #3
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Which wiring harness? All or just certain sections?
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Old 12-27-2010, 08:41 PM   #4
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Which wiring harness? All or just certain sections?
5 speed deal ecm,engine harness and engine from 95 into the 89.if its a pita i just do different deal.just weighing it out to see if feasable.
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Old 12-27-2010, 08:47 PM   #5
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If big pain i will carb it just like the efi driveability.my wifie tends to flood carb engines.
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Old 12-27-2010, 10:27 PM   #6
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Are you going to run the SN intake/TB, or a Fox intake/TB? The tranny functions are a moot point since it's a 5 speed, but the differences in the intakes and sensors is where you'll hit some snags. There's also the CCRM and wiring, and the differences in the timing cover and water pump length, but that can be remedied with an electric fan. You'll also have to modify a Fox harness grommet to go through the firewall, because on the SN's, the harness comes into the engine bay from behind the passenger side fender. I know some of this is no big deal, just throwing the info out that I know. I did a V8 swap on a '95 V6 a few years ago, and this is just what I'm remembering off the top of my head. I'll post up if I remember anything else.
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Old 12-28-2010, 09:36 AM   #7
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As Eric said above, the CCRM in the 95 would be my concern.
I can't remember exactly what it stands for but as I recall it is Central Command Relay Module.
It controls the voltage to the fuel pump, electric fan and I think the ignition module, may be some other items too.
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Old 12-28-2010, 09:51 AM   #8
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Craig, it stands for constant control relay module, and like you said, it controls fuel, fan, ignition, and some other important functions. I also wanted to add that Clyde will have to do either MIL eliminators, or turn off the rear O2's with a tuner. And to do that, he'll have to run the OBD test port leg of the harness into the car somewhere.
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Old 12-28-2010, 11:54 AM   #9
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Sound like a pita.thx for the info.
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Old 12-28-2010, 05:26 PM   #10
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Quote:
Originally Posted by EHardy1971 View Post
Craig, it stands for constant control relay module, and like you said, it controls fuel, fan, ignition, and some other important functions. I also wanted to add that Clyde will have to do either MIL eliminators, or turn off the rear O2's with a tuner. And to do that, he'll have to run the OBD test port leg of the harness into the car somewhere.
Thanks...I knew it was something like that.

On the O2's...the rear were not present until 1996. '94 and '95 were stil ODB I and did not have them.
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