Help with mystery A/C wire - Ford Bronco Forum
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post #1 of 5 (permalink) Old 04-13-2019, 01:55 PM Thread Starter
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Help with mystery A/C wire

Hi all,
Working on rebuilding and restoring the factory A/C system in my 85 Bronco.
I've come across a wire on the pressure switch that I have no idea about where it goes. I'm not seeing any other plugs it could go into.

Anyone have any ideas? Or could take a quick look at theirs and help point me in the right direction?

Thanks



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1985 Eddie Bauer Bronco. High Performance 9.1:1 compression 300 (305) I6. Roller Rockers, DUI ignition, Holley Sniper EFI. ZF5. 32" BFG A/T KO2s. 3.55 8.8" rear.
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post #2 of 5 (permalink) Old 04-13-2019, 05:21 PM
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Fast idle solenoid for the carb you no longer have?
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post #3 of 5 (permalink) Old 04-13-2019, 05:31 PM Thread Starter
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Not in this case, since the vehicle (and the A/C system) was originally equipped with a fuel injected 302.
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March 2016 FOTM
1985 Eddie Bauer Bronco. High Performance 9.1:1 compression 300 (305) I6. Roller Rockers, DUI ignition, Holley Sniper EFI. ZF5. 32" BFG A/T KO2s. 3.55 8.8" rear.
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post #4 of 5 (permalink) Old 04-13-2019, 06:29 PM
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Garage
Yo AB,
Here is the 1985 Electrical & Vacuum Troubleshooting Manual (partial) via Gary @ 1985 EVTM - Gary's Garagemahal (the Bullnose bible)

Sorry, I can't determine the wire colors.
Significant exceprts attached.
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File Type: jpg 1985-etm-page146.jpg (147.1 KB, 2 views)
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File Type: jpg 1985-etm-page148.jpg (191.6 KB, 1 views)
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post #5 of 5 (permalink) Old 04-13-2019, 07:39 PM Thread Starter
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Bronco Info: 1985 300ci 6cyl. ZF 5 speed manual. 32" tires. DUI ignition. Holley Sniper EFI.
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Thank you Miesk!

Looks like it goes to the "Electronic Engine Control" and is used to add a few revs to the engine when the A/C is engaged.

My Sniper EFI system has a wire just for that, and will kick up the idle when it's on. So, it looks like I connect it to that.
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March 2016 FOTM
1985 Eddie Bauer Bronco. High Performance 9.1:1 compression 300 (305) I6. Roller Rockers, DUI ignition, Holley Sniper EFI. ZF5. 32" BFG A/T KO2s. 3.55 8.8" rear.
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