Looking for help with A/C wireing on '72

[Jim S]

The wires for my AC unit were cut by the previous moron who was "restoring" my car.  The are 3 wires going to the AC fan switch.  There's a red one, a black and a green wire.  Does anyone know where these should go?  Also the compressor was removed and there's a blu wire hanging in the area where the compressor would mount. I hope that is for the clutch.  Can anyone verify this? Thank-you!

[ronmanfredi]

One should be +12v (red) and hot when the ign key is on, it goes to the main power terminal of the fan switch.  The next one (green) should go straight to the A/C temperature switch on the same panel (the other wire on the temp switch goes to the compressor.  The last one (black) goes to the blower motor.

[Jim S]

Thank you!

[Jim S]

I ran power as directed, and get nothing.  I ran 12+ straight to the black (fan wire) and nothing.  Does anyone know where on the box it is grounded?  I have the dash out, but don't see any ground wires. If it's grounded somewhere, I may have a dead blower motor?  I can't begin to imagine what it will take to get that thing out! 

Edited May 29 by Jim S

[Gunslinger]

Try a test light on the 12v wire to see if it’s getting power.  If not then you need to find out why.  

[ronmanfredi]

4 hours ago, Jim S said:

I ran power as directed, and get nothing.  I ran 12+ straight to the black (fan wire) and nothing.  Does anyone know where on the box it is grounded?  I have the dash out, but don't see any ground wires. If it's grounded somewhere, I may have a dead blower motor?  I can't begin to imagine what it will take to get that thing out! 

Gound wires in the car are white, so you need to check and see if the ground is good.  It is possible that the motor is bad also.  

[Jim S]

Problem solved.  I had the dash out and discovered the AC fan is grounded when it is bolted to the dash frame.  Dash back in, and Fan powers up!  Now on to troubleshooting no dash lights! It never ends!

[ronmanfredi]

17 hours ago, Jim S said:

Problem solved.  I had the dash out and discovered the AC fan is grounded when it is bolted to the dash frame.  Dash back in, and Fan powers up!  Now on to troubleshooting no dash lights! It never ends!

I spent a year working all the bugs out of our 82 model.  Electrical, A/C, oil leaks, ring and pinion noise, rebuilt front suspension, etc., etc.  But when your finally done, you'll have a nice car and well educated on Avanti...