A.c

Topic: A.c (Read 1244 times) previous topic - next topic

A.c

July 16, 2012, 05:49:27 PM

When I did my build I took out the wires to the a.c Now I want it back? Has any ever done this? I can get all under hood stuff from latemodel restoration. The plugs and wiring to turn on the comp and fan Im at a loss for I figure I'll get the plugs from the local yard but what powers what and what order. If I can come up with the scratch It's something is do soon if not over the winter.
Thanks

A.c

Reply #1 – July 17, 2012, 11:07:06 AM

It is not to hard haven't done what your asking but it should work like this. The main A/c compressor clutch wires come from the back of the control unit in the dash. Should be something close to this with either setup manual or electronic. Then once you get that wire into the engine bay you would need to work in the A/c compressor relay. Now this one gets wired to the low pressure switch. This need to be hooked up to where when the low pressure switch shows no/to low pressure it makes the compressor relay stay open(compressor not kicking in). Then the next relay has to do with Wide open throttle it needs to be wired in, like the other relay only wire it to the TPS so that once you show wide open throttle it cuts out the A/c compressor.Also you would need to get signal to the ECU letting it know you have turned on the A/c so it knows to idle up and turn on the fan/fans out front so you don't over heat and it keeps you cool. I know just telling and not showing what I would recommend is get you a wiring diagram for the A/c system and look that over it should be rather simple to get this back into you car. Maybe some work but not to hard.

Hoping to help
Stuckman

A.c

Reply #2 – July 17, 2012, 06:07:44 PM

I get what your saying I could probably rig a microswitch on the carb for wot and power a relay to turn fan on when compressor is on. But Ecu and idle up are not currently an option. How bad is to have ac on under wot?

A.c

Reply #3 – July 18, 2012, 04:01:38 PM

Not sure how bad it is to do that. I know they have it kick off to give you that lil bit of extra power your wide open you wanna go not be cool! Other than that I have no idea! As far as idle just have to set carb to idle higher so it don't drag the motor down to much when you turn on the A/c not a big deal.

Stuckman