Air Conditioner Compressor-On Board Testing

1980-1986 Datsun 720 forums. All 720-specific topics and discussion can be found here.
baymtnman
Posts: 3
Joined: Sun Oct 14, 2012 9:09 am
Car: 1985 Nissan King Cab 4whd
Location: Clayton, CA

Air Conditioner Compressor-On Board Testing

Postby baymtnman » Fri Jun 01, 2018 7:27 pm

I have a 1985 720 with an air conditioning compressor which appears seized. By that I mean the outer pulley spins, but the inner hub does not spin either with the A/C switch "On" or I manually attempt to turn the inner hub. I wish to test the electrical connection to the compressor coil before pulling it off the block. The electrical connection seems to be underneath the distributor. Does anyone know if I have to pull the distributor and run a bypass circuit from the battery directly to the electrical connector of the compressor to make sure there is no electrical problem?

Thanks,


Keith


baymtnman
Posts: 3
Joined: Sun Oct 14, 2012 9:09 am
Car: 1985 Nissan King Cab 4whd
Location: Clayton, CA

Re: Air Conditioner Compressor-On Board Testing

Postby baymtnman » Sat Jun 02, 2018 7:50 am

I am also looking for the low pressure cut-off switch. Could a low pressure cause the inner hub not to turn even manually?


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