AC compressor Switch Relay.

[Big Dawg]

Hi guys,

Okay so I switched my AC compressor for new one as my clutch was messed up. I unplugged my ac compressor pigtail on the unit until I had installed a new one and had a shop put the refrigerant back in. Once it was all ready and I fired it up...the compressor wouldn't engage. I checked the fuse on the drivers side and it was fine. I checked the pressure switch and the pigtail and it was getting voltage.....but the pigtail to the compressor wasn't. So I checked the relay and it is toast. I jumped the pink to the green wire and clutch engaged.

Now my question is it okay for me to install Bosch style relay instead of the stock one. Or is it imperative that I get the stock one. I just can't seem to find and at my local.parts store or online.

Any help will appreciated.

Thank you

 

[pacecarta]

try four season 35907 , supposed to be interchange for the unavailable delco 15-2371

but a relay is a relay , as long as you have the matching socket

 

[Big Dawg]

Okay thanks so much.....I would like to keep it as factory as possible....I am going to order it from rockauto as it's available.

Out of curiosity what is the other relay for?

Thanks again

 

[Big Dawg]

Okay thanks so much.....I would like to keep it as factory as possible....I am going to order it from rockauto as it's available.

Out of curiosity what is the other relay for?

Thanks again

Ahh Fuel Pump Relay figured it out

 

[Big Dawg]

Hi guys,

Okay so I switched my AC compressor for new one as my clutch was messed up. I unplugged my ac compressor pigtail on the unit until I had installed a new one and had a shop put the refrigerant back in. Once it was all ready and I fired it up...the compressor wouldn't engage. I checked the fuse on the drivers side and it was fine. I checked the pressure switch and the pigtail and it was getting voltage.....but the pigtail to the compressor wasn't. So I checked the relay and it is toast. I jumped the pink to the green wire and clutch engaged.

Now my question is it okay for me to install Bosch style relay instead of the stock one. Or is it imperative that I get the stock one. I just can't seem to find and at my local.parts store or online.

Any help will appreciated.

Thank you

Update,

Hi everyone, i need help in regards to my AC system

So heres what i got. I have an 85 Hot Air turbo with DigitalClimate Control. So in line with my post the other day where i thought it was a relay issue, it isn't. The relay came in from Rockauto and AC clutch still doesn't turn on.

Here's what the voltage is at the relay plug...with the relay disconnected and car started


Relay plug
Pink with Black stripe 13.85-13.89 v
Dark Green .020 ( goes to compressor plug)
Green with yellow stripe 0 v
Blue 2.45V

Pressure switch (unplugged)
Light Green 3.30-3.33v
Blue 0v (as it is unplugged)

With the pressure switch completed both sides of switch have 3.30-3.50 Volts

Ac compressor wiring ( with ignition on only) and relay plugged in
Green - 0.10v
Black - 0.01

I have no idea what is going on. When i jump the pink and green wire on ac switch relay plug the compressor clutch engages and than eventually starts a small squeal and than after a couple engagements of me disconnecting jumper and connecting 12v the clutch engages but doesn't spin with pulley This is what was happening with my previous ac compressor and clutch as well and I though the clutch was bad. After this happening to the new compressor it's something entirely different.

I have recorded a small clip and will attach the short from YouTube on here to show you what I am seeing and hearing.

 

[Big Dawg]

Also I just thought of one other thing, I don't think I ever changed the pressure switch when went from R12 to R134. It still has the stock R12 designated switch from 85. Wonder if that would cause issues like I'm having now?

Also I have never seen a hi pressure switch on the line on this car. No connector or anything. Did the 85 Hot air not have one?