1972 350/200
Just got my car back from storage and my AC has quit working (worked last fall). Here's what I checked.
I checked the AC fuse in the fuse box and it is good but no power to the compressor. If I unplug the thermal limiter fuse and check voltage to the socket, I do not measure any power on any of the 3 pins. Shouldn't I measure power on at least one of them with the AC on? Is there a way to ohm this part out to check it?
I check the low-side pressure and it was good. I don't really trust my gauge but it said I had about 60psi (this was on the valve closest to the engine - low side I presume). I jumpered +12 VDC to the compressor - it came on and blew cold.
I also see that the compressor has a line coming off the back of it (black w/ yellow stripe). Is this a low or high pressure switch? If it is, what monitors this line and cuts power if it is low? It this also done in the thermal limiter fuse?
I have to get my hands on a schematic as I don't have one at the moment. The wiring diagram I have doesn't show the AC system.
Any idea what might be wrong here (or a good source for a wiring diagram w/ AC)?
Just got my car back from storage and my AC has quit working (worked last fall). Here's what I checked.
I checked the AC fuse in the fuse box and it is good but no power to the compressor. If I unplug the thermal limiter fuse and check voltage to the socket, I do not measure any power on any of the 3 pins. Shouldn't I measure power on at least one of them with the AC on? Is there a way to ohm this part out to check it?
I check the low-side pressure and it was good. I don't really trust my gauge but it said I had about 60psi (this was on the valve closest to the engine - low side I presume). I jumpered +12 VDC to the compressor - it came on and blew cold.
I also see that the compressor has a line coming off the back of it (black w/ yellow stripe). Is this a low or high pressure switch? If it is, what monitors this line and cuts power if it is low? It this also done in the thermal limiter fuse?
I have to get my hands on a schematic as I don't have one at the moment. The wiring diagram I have doesn't show the AC system.
Any idea what might be wrong here (or a good source for a wiring diagram w/ AC)?
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