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Home » Public Forums » GMCnet » a/c Request Wire on a Howell Wire Harness
a/c Request Wire on a Howell Wire Harness [message #366048] Tue, 10 August 2021 08:49 Go to next message
Tom Katzenberger is currently offline  Tom Katzenberger   United States
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Registered: June 2019
Location: Kingsville, MD
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I have a green wire on the Howell fuel injection harness that has a green wire which reads "A/C Request". I would like to buy a vowel as to where this wire goes?

Thanks Guys,
Tom K.


Tom & Oki Katzenberger, Kingsville, Maryland, 1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
Re: a/c Request Wire on a Howell Wire Harness [message #366049 is a reply to message #366048] Tue, 10 August 2021 08:56 Go to previous message
lqqkatjon is currently offline  lqqkatjon   United States
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Registered: October 2010
Location: St. Cloud, MN
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Senior Member
taped up and not used. Probably the best answer.

it would go to the A/C high pressure switch. I believe it senses voltage there when the A/C clutch gets power to engage, and it kicks the idle up a little to cover the compressor load on engine.. I don't think many people hook up that wire. I have a sandeen compressor, so I can't even tell any change in rpm when my compressor kicks in, so it is not hooked up on my efi(ebl/rochester- not a howell, but almost identical wiring wise).



Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/
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