Engine Harness: Manual/Electronic A/C
Thread Starter
Racer
Joined: Sep 2007
Posts: 401
Likes: 7
From: Irvine CA
Engine Harness: Manual/Electronic A/C
Hey guys,
I found one for sale that is the same year for the same transmission, however it is for electronic instead of manual A/C.
My understanding is that we also have an in-dash harness that hooks up to the sensors and A/C unit in addition to the engine harness.
I would assume that I would be able to have the A/C wires for the new engine harness (electronic A/C) swapped with the wires from my car (manual A/C)? I'm trying to find out if buying the new harness with electronic A/C instead of manual A/C can be made to work, or would be a waste of money.
Thanks,
Will
I found one for sale that is the same year for the same transmission, however it is for electronic instead of manual A/C.
My understanding is that we also have an in-dash harness that hooks up to the sensors and A/C unit in addition to the engine harness.
I would assume that I would be able to have the A/C wires for the new engine harness (electronic A/C) swapped with the wires from my car (manual A/C)? I'm trying to find out if buying the new harness with electronic A/C instead of manual A/C can be made to work, or would be a waste of money.
Thanks,
Will
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
A/C - Electronic or Manual is part of the Body Harness. If you're just getting the ECM harness, the a/c signal wire should be the same. For Manual a/c, it's spliced into the compressor control circuit and then to the ECM (12 volts). For Electronic, it's a separate Circuit from the Control Panel - 6 volts. ECM recognizes either voltage as an A/C request and increases IAC counts; cuts power (removes ground) at WOT. Fan signal is the same too - separate circuit from the ECM to a normally grounded switch on the High Pressure Line. You'd probably benefit from some schematics including the full body harness which folds out from the rear of the Service Manual through '89..
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Interesting timing on this post...
Posting the year of your car will be very helpful.
See this thread:
http://forums.corvetteforum.com/c4-t...some-help.html
Posting the year of your car will be very helpful.
See this thread:
http://forums.corvetteforum.com/c4-t...some-help.html
