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8/15/09 4:09pm - Original Message: 'Compressor clutch not working'
Emil
Former Member
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NEWPORT NEWS, VA - USA

Vette(s):
1977 L-82

Joined: 3/26/2002
Posts: 25
I had my engine rebuilt this winter and have not had time to use the car much once the summer started.  A few weeks ago I noticed the AC was not working.  Because the engine was out and the AC lines were folded out of the way I thought I was low on 134a.  I just got time to work on it today and the pressure was at 42 lbs. no problem there.  When I started to look further I discovered the clutch was not working.  I checked for 12v at the clutch (green wire to ground) and and did not get a reading.  When I looked further I found 2 dark green wires terminating on a single connector, but the connector was not hooked to anything.  I checked the pressure switches and they all had wires connected to them so the big questions, what should these sires be plugged into and why won't the clutch activate?  Any toughts? Anybody got a wiring diagram for a 1977?
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8/15/09 8:01pm - Reply: 'Compressor clutch not working'
ranger3 Lifetime Member
Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
A green wire should come from one side of the pressure switch and go to the plug on the compressor. There should be a 12vdc wire going into the other pole of the pressure switch. Check to see if you have 12 vdc at the pressure switch. If you do, run a wire to the compressor and see if it kicks on. You can also run a jumper across the pressure switch to check the compressor.

Scott


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C3VR Lifetime Member #114


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8/16/09 10:53am - Reply: 'Compressor clutch not working'
anips
Standard Member
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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe

Joined: 8/9/2002
Posts: 783
I believe there should be a inline 30 amp fuse somewhere, not the one in the fuse box, check to see if its on the 12vdc wire.

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8/16/09 2:34pm - Reply: 'Compressor clutch not working'
Emil
Former Member
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NEWPORT NEWS, VA - USA

Vette(s):
1977 L-82

Joined: 3/26/2002
Posts: 25
I have been rying to find the inline fuse but no luck so far.
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 Forums -> C3 Cooling and Heating Systems
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