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Old 07-02-2022, 07:52 AM   #1
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2008 Dynasty 42' Aux compressor fell off

My aux compressor fell off leaving me with 2 wires and T with broken pressure switch on it. Ive purchased new Firestone compressor and a new pressure switch. question i have is what do the 2 wires connect to? They cant both connect to the pressure switch then what would the compressor motor connect to. Any help thx
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Old 07-02-2022, 12:58 PM   #2
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Two wires are usually needed on the pressure switch, one in the power coming from your control circuit, when the switch senses low pressure it closes the circuit and the other wire goes to the compressor motor.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 07-04-2022, 09:08 AM   #3
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Long discussion on the aux pump Posts 24 and 42 seem to be most relevant for wiring. Not sure if that 2008 chassis is "exactly" the same but "most" stuff carries over year to year with systems. There are several posts in the thread that discuss the "right" wire goes to...

I wrapped the open air vent end of mine with semi porous a/c filter foam years ago to keep road crud out...155k miles and it is still operable, dust it off lightly with a shop brush when greasing chassis.

Good Luck.
Happy Trails,
06 Dynasty Countess III ISL//3060
07 Hummer H3
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