AC Step-By-Step or Where to Start?

[pontiacgp]

those 2 green wires look like an add on and are not what I was talking about, the compressor has a green that originates from the plug for the pressure switch on the dryer

 

[TURNA]

those 2 green wires look like an add on and are not what I was talking about, the compressor has a green that originates from the plug for the pressure switch on the dryer

This green wire on top of the compressor

 

[Texas82GP]

I would unplug the connector at the low pressure switch on the accumulator. Turn the key on. Turn the A/C on. Check for 12V at one side of the low pressure switch connector. Report back.

 

[pontiacgp]

I would unplug the connector at the low pressure switch on the accumulator. Turn the key on. Turn the A/C on. Check for 12V at one side of the low pressure switch connector. Report back.

and if power if there you can jump the two wires to see if the compressor works, the power just engages the clutch so you would hear a click if the engine is not running

 

[Gonzo1970]

I would unplug the connector at the low pressure switch on the accumulator. Turn the key on. Turn the A/C on. Check for 12V at one side of the low pressure switch connector. Report back.

and if power if there you can jump the two wires to see if the compressor works, the power just engages the clutch so you would hear a click if the engine is not running

Thanks Gents!

Going to see if I have my tester (or my emergency tester - 2 wires and a 12v bulb) in the car.. that sounds easy enough to do at lunch.

-Gonz

 

[Gonzo1970]

We have Progress!!


Didn't have the tester, so grabbed a piece of wire and jumped the Low Pressure switch. Nothing.

My low pressure switch has 3 green wires, not one green and one black..

So, thinking.... Green, Green... eh, what the hell...

Connected those two loose green wires from the first pic, jumped it again, and low and behold... the compressor kicked in!


So, that would be... low on the refrigerant, right?
And if so, the system doesn't Use refrigerant, per-se... so if its empty/low, it had to have gone somewhere... as in a leak... right?
So, fill it? With what? (Or am I getting ahead of myself here.. sorry, its 90+ and Hot AF when I get in it after work... mornings aren't bad, tho..)

-Gonz

 

[pontiacgp]

One green wire going in is the power, the two green coming out goes to the compressor and one goes to the high idle solenoid on the carb. Trace back where those two green wires originate from.... 🤔

 

[Gonzo1970]

One green wire going in is the power, the two green coming out goes to the compressor and one goes to the high idle solenoid on the carb. Trace back where those two green wires originate from.... 🤔

Will do.. It looked like someone cut and pulled them out of the loom.. Someone has definitely been monkeying with the wiring in the looms.. Im finding wires that look like they have been grazed with a knife (some insulation missing). My guess is they were looking for a bad wire?

-Gonz

 

[Gonzo1970]

Dark Green Wire went from low pressure sensor to the compressor. So the wire in Pic1 was actually the dark green wire in Pic2.

(Gee, guess I shoulda looked at that first, huh?)

-Gonz

 

[Gonzo1970]

If everything is plugged in and not working push the little schrader valve (tire valve) on the AC line

if nothing comes out your lines are empty and that is why your compressor will not turn on

If something comes out you may be low on freon and that is why it is not turning on so add a can

I pressed the little tire valve thing, and some did come out... it didnt SHOOT out, but there was a little pressure there...

-Gonz