Climate Control Wiring Question

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Nov 12, 2005 | 06:22 PM

ProfessorOhki

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Climate Control Wiring Question

Do any of you know (or know where I might find) a list of the pinouts or a schematic for the AC / Temperature / Fan controls? Vehical in question is a 1998 F-150. I tried looking around the old posts a bit, but couldn't find exactly what I was looking for.

The more detailed you can be the better. Thanks

Nov 12, 2005 | 11:22 PM

BillyBob69

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From: Wheatland, Mo

It may cost you about $14 but a Chilton's manual csn be a life saver.

Nov 13, 2005 | 12:05 AM

ProfessorOhki

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I actually have one sitting on my lap, but it shows where and into what they plug into, it doesn't describe the function of the wire bundles or the wires. Or says something like "fan control wires to blower." Now I assume that the fan control is a 5-way rotary switch, and the A/C probably is too, but what about the temperature, is it some sort of potentiometer? If it is, what its resistance range?

Nov 14, 2005 | 08:20 AM

BillyBob69

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I believe the temperature is a pot directly on the control. Sorry it has been awhile since I dove into the climate controls.

Anyone else chime in?

Nov 14, 2005 | 08:43 AM

ProfessorOhki

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I suppose I should include why I want the information. I'm considering making an electronic climate control system of my own, or at least interface the existing one to a digital system. So, I'm trying to figure out what sort of method I'd have to apply to convert those three ***** to something a digital device could control.

Nov 14, 2005 | 08:47 AM

BillyBob69

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Have you thought about maybe trying to scavenge an electronic system from another vehicle, (after checking the wiring for it), and retro fitting it to yours? You are talking about a Ford. Maybe there is something in a Mercury or even another Ford with fancier options that has what you are looking for. Could make it easier.

Nov 14, 2005 | 09:47 AM

MrBSS

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Yeah, it seems like that would be easier. I've been wanting to change mine to EATC since I bought it, but still haven't got around to it. Since the later Lariots had EATC, not to mention many of the similar Expys and Navigators, it should be relatively easy.

I'd at least like to set it up so that it would sense the coolant temperature and not blow air when on the "floor" position until it heated up. Before they had Automatic Temp Control, many vehicles had that at least.