1988 C1500 AC relay location

[frijoli]

Can someone tell me where the AC relay is for the AC Clutch? I did a google search and get every answer but that one.

 

[PlayingWithTBI]

Can someone tell me where the AC relay is for the AC Clutch? I did a google search and get every answer but that one.

It appears there was 2 iterations of A/C controls. My 88 is like the upper diagram with no external relay. It uses Lt Grn and Dk Grn for the A/C clutch.

The 2nd circuit appears to have an external relay, which is probably mounted on the fire wall next to the fuel pump relay. Mine has the diode wired at the clutch where the one with the relay doesn't.

Look at the wires going to the clutch (s/b Dk Grn not Grn/Wht, and Blk) and see if it has a diode too.

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[Ron88]

Mine has an auxillary relay on the firewall next to the fuel pump relay
but im not sure if it has anything to do with the a/c

 

[frijoli]

I'm guessing mine is under the dashboard. Any good links to troubleshooting A/C electrics?