Need help on removing TBI computer and keeping AC functional - The 1947 - Present Chevrolet & GMC Truck Message Board Network

UATahoe · 05-13-2017, 01:03 PM

I am in the middle of an LS swap currently and I have removed the entire TBI wiring harness and ECU from my 87 pickup. For some reason I didn't catch the part of the AC wiring was routed through the ECU. It's just one wire that runs to what I believe is the high pressure switch. I am assuming it uses this to manipulate idle when the AC kicks and bump it up? At is it actively receiving a turn on request to subsequently engage the clutch of the compressor?

05-13-2017, 01:03 PM	#1
UATahoe Registered User Join Date: Mar 2012 Location: Huntsville, AL Posts: 1,000	Need help on removing TBI computer and keeping AC functional I am in the middle of an LS swap currently and I have removed the entire TBI wiring harness and ECU from my 87 pickup. For some reason I didn't catch the part of the AC wiring was routed through the ECU. It's just one wire that runs to what I believe is the high pressure switch. I am assuming it uses this to manipulate idle when the AC kicks and bump it up? At is it actively receiving a turn on request to subsequently engage the clutch of the compressor?



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