How do I check power to my A/C compressor?
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Supreme Member
Joined: Jan 2000
Posts: 1,193
Likes: 91
From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
How do I check power to my A/C compressor?
I just installed a brand new upgraded A/C system. New evap, accumulator, condenser and compressor. Just wanted to know if I have to somehow trick the system into thinking it has freon so I can see if I get the 12 volts to the compressor wire. I have an 87, so there's one connector with a green/black wire and a green/white wire as well as a black and an orange wire. I think the back/green was for a switch on the old R4 compressor so thats not used anymore. I just want to make sure the car will actually turn the compressor on before I go get it filled.
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Joined: Apr 2015
Posts: 467
Likes: 8
From: Waldron Arkansas
Car: 1986 IROC Z28
Engine: Carburated small block 454
Transmission: Level 3 Raptor 700R4 2600 stall
Axle/Gears: Strange S60 3:73 S Trac Posi
Re: How do I check power to my A/C compressor?
You can jump the two wires at the pressure switch to make the system think it has freon, just make sure not to leave it jumped for more than a split second to see if the clutch kicks in or you will burn it up.
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