Can I first say that every over the counter repair manuel really sux on this subject. I mean if I wanted to take my car to a professional I would of never bought the repair manual in the first place..

Well enough of that on to my prob.

First off I have no idea if the a/c has ever worked at all. With the car running and the fan selector on high and the temp. selector on cold, whenI slide the lever to max a/c it turns on the fan but no a/c. the car goes up about 50 rpm but I don't hear the compressor kick in. I have tried in all of the fan settings and in the econ position. The first thing I checked was the fuse(there is only one right), it was good. next I checked the voltage at the compressor, it reads at .1 volt. just to be sure I also checked the altinator it is putting out 13.4v. I am assuming that there is a problem with the power to the compressor but i'm not sure.

I have read in other posts about checking the slider that you select for a/c, all I see underneath it is some sort of vaccum tubing.

And in my chilton it says nothing about the electical side of the a/c system.

The car is a manual. numbers matching engine. from what I can tell everything is original.

 

The power wire to the compressor goes to the pass. side to a switch.
Check for power on both sides of the switch. If the freon is low, probably, & there is power, you will have power in to the switch, but not out to the comp.

 

Thanks I will check when I can.

 

Thanx for the info. Checked the switch and your right there's power to the switch but not after.

My next question is should I just have the r-12 filled or should I have it converted to r-134. Anyone know what the approx. cost for each should be around. I don't want to get ripped off.

 

I have just been in the process of converting and here is what I have so far. I bought the adapter valves where you hook your gages up at Auto Zone for under $10 and a bottle of pac oil for about the same. You need to pjour the oil out of the compressor and put new in. I also bought a new low pressure switch that is adjustable to allow the compressor to cycle at a different pressure (that what I was told to do). I would advise flushing the condensor and installing a new orfice tube. I also bought a new acumulator for about $35.

hope this helps
Bobby

 

Bobby, where did you find the adjustable low pressure switch? Just converted my 81 and it doesn't cycle like I think it nees to..

 

I found my recycleing switch at Auto Zone and there is a place to adjust with a screw driver when you unplug the electrical from the switch.

 

I am working on my 1980 and my problem is that I get no power to the compressor or the cycle switch. Where is the A/C fuse...the writing is gone from my fuse panel.