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beanbrain

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good afternoon everyone I have a 2005 IH 4300 ambulance that I removed the ambulance body & put on a sleeper and bed to pull fifth wheel camper as soon as I can get my ac fixed. I have a problem with voltage only at compressor plug is 6.8 volt need 12 check any Ideas????????
 

Will L.

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I dont know the rig, but check your schematic for the order the signal goes through. Check power from battery negative to each location with the component unplugged
 
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