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ECU ac switch pin

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Old 05-06-2013, 11:15 AM
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ECU ac switch pin

Hello, ive done some searching, and came across a couple post's with ecu pins, however I can't seem to find the one I need. I am looking for the ac pin on which I can intercept that line with a switch, so I can raise my idle a bit for my trailer winch. I ran a wire from the battery to the back with a plug so I can tow car's on my trailer without needing another battery on the trailer, etc.

Without me having to hold my foot on the gas, I was thinking if I can ground this signal, tricking the ecu to thinking the ac is on, itll raise my rpm's enough for the winch.

Thanks.
Old 05-06-2013, 11:28 AM
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There is an ac idle up vacuum solenoid, tap into that directly
Old 05-06-2013, 12:49 PM
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Where is that exactly? Happen to know the wire to ground? Thanks in advance.

Last edited by TurboTSI95; 05-06-2013 at 12:51 PM.
Old 05-06-2013, 01:04 PM
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Its under the hood in the engine bay. Thats all I can tell you. Try to google it.
Old 05-06-2013, 01:23 PM
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Well I found it, but how am I suppose to actually use that to increase engine rpm with a switch? It is vacuum controlled. I need something electronic. . .
Old 05-06-2013, 01:30 PM
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its an electronic vacuum switch
Old 05-06-2013, 01:32 PM
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what year motor?
Old 05-06-2013, 04:42 PM
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Red face

If you need to raise your rpm to winch a car on a trailer you have to small of a battery.

it also would be a big help to say just what your working on:jessica:
Old 05-06-2013, 04:56 PM
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edit to add: I just noticed you screen name and avitar. It looks like you have a 1995 truck. The parts fiche link and comments I posted are for up to an 1988 truck.


Originally Posted by TurboTSI95
Well I found it, but how am I suppose to actually use that to increase engine rpm with a switch? It is vacuum controlled. I need something electronic. . .
The A/C idle-up is vacuum controlled already via that electronic switch. The switch switches the vacuum on or off to the idle-up diaphragm according to the needs of the air conditioner.

http://www.utoyot8.com/images/147907305/154891666.png

Tap into that switch to trigger it. You'll have to determine if it is positive or negative switching.

Last edited by slow-mo; 05-06-2013 at 05:02 PM.
Old 05-06-2013, 06:59 PM
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^ Perfect, thank you!
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