henrikse

I have been putting my a/c back together and thought I had everything.
I have the Willcox diagram for 1974 Corvette. c/w wiring and components.
1) I can't find my pressure switch.. I found wire coupler with Tan/green wire which I believe is for it.
2) Where is a/c relay?
3) Where is comp sw?
4) By master switch does it mean the thumb wheel on the console that control A/C in the car?




Thanks for any help and Have a Great Day!

Spot Rot

If memory serves, there are 2 micro switches in the thumb wheel assembly that could be the ones labeled master sw and comp sw.

The pressure switch was a single terminal on the back of the compressor on some years which grounded the thermal fuse (which I don't see in that diagram). I seem to recall that GM went to a different means to handle the low refrigerant situation.

In other words, the diagram you received might not be correct for your 73.

vettz73

The a/c relay assembly is located by the resistor. See upper left in the diagram above.

The cut-out switch is located on the back of the compressor. See View B in lower right of the diagram.

henrikse

Thanks for the pic. I don't see any cutout switch on back like your pic? I see a threaded fitting on left side back of comp that looks like an 8/32 bolt would go into. No sign of cut out switch. I know the engine is a 1973 and the # on a/c compressor is Delco air 5910738 code 041871.Is the code Apr 18 1971? I know parts on car are from 73 vette and some items like 4 speed from a 1967 so mixed up, I have the connector green /blk for front of compessor. And another green/black in coupler behind which may be for a fuse? My problem is when I plug front connector in clutch on compressor engages all the time (I hear and see it.

vettz73

Here are some pictures of the back of my a/c compressor. First picture shows the back of the compressor with the switch and the second shows the wire connected to the switch.





The a/c hasn't worked since purchasing the car. On my 'to-do' project list to fix. PO used generic a/c hoses that are too long and wraps around the compressor. That's the hose at the bottom of the pictures.

henrikse

Yeh Looks like mine with the threaded coupler to the left side but I don't have the wire or switch

Lee726

Mine has the single cutout bur no wiring. anyone know how it connects and to what please? thxs.

vettebuyer6369

You are responding to a post from 4 years ago. Time to start a new thread with your question.