Cool Breeze Thread...Need an '88 Wiring Diagram!

[Kwik_Cutty88]

If you are taking your Cutlass to your Senior prom this year why does your girlfriend care if it has a/c. Are you going to buy your Cutlass a corsage?

Because it will most likely be hot as hell here in NC, and we took the car last year with no AC and it wasn't too pleasant haha.

 

[pontiacgp]

I think my question sailed over your head...😀

 

[Kwik_Cutty88]

I think my question sailed over your head...😀

It sure did, that was a sly one sir 😉

 

[Kwik_Cutty88]

So I made sure the light green wire coming out of the HVAC Switch in the car had power when the AC was on. And it does have power, so I'm a little stumped as to why the pressure switch connector doesn't. I followed the HVAC harness from the engine bay into the car and I don't see any breaks or anything suspisious.

 

[pontiacgp]

is the dark green wire giving the switch ground?

 

[Bonnewagon]

OK so the light green wire going TO the pressure switch has power? But the dark green wire coming OUT does not? That would be correct. It is a normally open switch that closes under pressure. There has to be a closed system with a 20lb charge in it or the switch won't let the compressor run at all. As for the red wire it needs to go from hot 12volts at the starter directly to the blower relay according to the diagram. The resistor gives less voltage to the blower depending on speed chosen. The "HI" setting energizes the relay giving fat 12 volts to the blower.

 

[Kwik_Cutty88]

OK so the light green wire going TO the pressure switch has power? But the dark green wire coming OUT does not? That would be correct. It is a normally open switch that closes under pressure. There has to be a closed system with a 20lb charge in it or the switch won't let the compressor run at all. As for the red wire it needs to go from hot 12volts at the starter directly to the blower relay according to the diagram. The resistor gives less voltage to the blower depending on speed chosen. The "HI" setting energizes the relay giving fat 12 volts to the blower.

The lt. Green wire coming from the heater controls has power, so the heater switch has power. The pressure switch does not have power at either wire. I have not checked to see if the dark green wire is actually a ground. The red wire that is supposed to go to the started I have to reconnect. Which makes sense why it was cut when the 307 was pulled.

 

[Bonnewagon]

I can only refer to this chart. The dark green wire goes to the compressor clutch. If the light green wire to the pressure switch has no power, and yours had a computer, the wire maybe waiting for the computer to enable it. If that's the case you will need to figure out how to wire it sans computer. That would probably be the AC switch on the dash, but I'm not 100% sure what if anything the computer did for the AC. Or maybe it's just a fuse issue?

 

[Kwik_Cutty88]

I can only refer to this chart. The dark green wire goes to the compressor clutch. If the light green wire to the pressure switch has no power, and yours had a computer, the wire maybe waiting for the computer to enable it. If that's the case you will need to figure out how to wire it sans computer. That would probably be the AC switch on the dash, but I'm not 100% sure what if anything the computer did for the AC. Or maybe it's just a fuse issue?

You know I haven't even checked the fuse, good point. I thought the only input the computer had on te AC would be a WOT cutoff switch. Then again there is no sort of switch near the gas pedal

 

[pontiacgp]

You should check the pressure switch with a multimeter so you can check to see if it is open or closed