1978 ac help
Thread Starter
Drifting
Joined: Apr 2004
Posts: 1,424
Likes: 127
From: Mequon WI
1978 ac help
Blower works, AC fuse good. Move temp selector to hot and get hot air, move to cold and get cooler air. Visually checked switch behind glove box and dog moves switch in and out. Get air from defrost, vents or footwells as selected.
I have no power to the green wire on the compressor. Don't see a wire diagram in AIM. I see a swtch with. 6 or seven wires but I dont know what wire does what. Don't know how this switch works either but I guess this is the place to start.
Anyone know where I can get a wiring diagram and operationg description of how this works?
I have no power to the green wire on the compressor. Don't see a wire diagram in AIM. I see a swtch with. 6 or seven wires but I dont know what wire does what. Don't know how this switch works either but I guess this is the place to start.
Anyone know where I can get a wiring diagram and operationg description of how this works?
Safety Car
Joined: Jun 2004
Posts: 4,372
Likes: 223
From: Beecher Illinois
In the pic, center right side.
Fitting with the wires. Unplug it and jump. You'll need to do that to add Freon, too.
Racer
Joined: Jan 2013
Posts: 300
Likes: 10
Ac
Low on refrigerant is probably the cause. When it drops below 45psi the switch turns off the compressor. You do not have to jumper it to add refrigerant. Just add refrigerant at low pressure port, when the pressure reaches 45-50 psi the compresser will engage. Be sure to have AC on max and blower on high. Obviously you will need to see why the refrigerant leaked out.
