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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 02-13-2010, 10:45 AM   #1 (permalink)
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A/C engaugement

Was wondering if anybody knows which wire is the one that activates the ac pump? My compressor does not seem to be kicking in.
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Old 02-17-2010, 07:58 PM   #2 (permalink)
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I can't tell you right off the bat but I do remember that if the system does not have enough pressure in it the compressor will not activate.
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Old 02-17-2010, 11:18 PM   #3 (permalink)
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Old 02-18-2010, 01:37 AM   #4 (permalink)
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Ok on the firewall on the passenger side there is a canister with a two wire prong on it. If you jump the wire and the ac pump comes on then you are good. (just have to charge the ac system). If you jump it and nothing happens then you might have a bigger problem on hand. But from my experience if you havent thrown a belt off the ac compressor then it is just low on coolent. and not locked up. But like i said im no expert.
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