The vacuum pump on my Scenic Cruiser is under the dash against the firewall where the heater fan is located. I had it fail and was replaced under warranty. On my coach it was an Evans product.
I was thinking about the compressor you are talking about on your coach and was wondering if it might have something to do with the air horns. Just a guess my coach does not have, what you described in that compartment.
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2002 Gulf Stream Scenic Cruiser
2018 Buick Envision Essence
Neway Freightliner chassis
Aventa II Blue Ox
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