The Ford Barn

Noswal · 01-17-2019, 08:50 PM

Maybe a little too new for here but here goes. I am putting a 5.8 engine from a 1990 F150 into my 1978 F100. The engine is complete with the AC compressor.
The compressor in my '78 only had one wire (power wire) and the compressor from the '90 has two wires. Anybody tell me how to wire this compressor to work in my '78?

craig · 01-17-2019, 11:33 PM

The 78 just has a power wire and the ground is thru the compressor itself. The 90 has both power and ground wires, since this is just an electro magnet, it wouldn't matter which terminal you put to ground and the other can go to your existing power wire

Noswal · 01-18-2019, 12:32 AM

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Thanks Craig. That's the info I need.

01-17-2019, 08:50 PM	#1
Noswal Senior Member Join Date: May 2010 Location: Manchester, TN Posts: 186	Help wiring AC compressor Maybe a little too new for here but here goes. I am putting a 5.8 engine from a 1990 F150 into my 1978 F100. The engine is complete with the AC compressor. The compressor in my '78 only had one wire (power wire) and the compressor from the '90 has two wires. Anybody tell me how to wire this compressor to work in my '78?

01-17-2019, 11:33 PM	#2
craig Senior Member Join Date: May 2010 Location: The Inland Empire of Washington State Posts: 368	Re: Help wiring AC compressor The 78 just has a power wire and the ground is thru the compressor itself. The 90 has both power and ground wires, since this is just an electro magnet, it wouldn't matter which terminal you put to ground and the other can go to your existing power wire

01-18-2019, 12:32 AM	#3
Noswal Senior Member Join Date: May 2010 Location: Manchester, TN Posts: 186	Re: Help wiring AC compressor Sponsored Links (Register now to hide all advertisements) Thanks Craig. That's the info I need.