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Old 03-22-2015, 01:29 PM   #1
AI owner since June 2013
2014 Interstate Ext. Coach
Lake Mary , Florida
Join Date: May 2013
Posts: 25
Interstate EMS System Questions

I have read many forum posts warning to carry extra fuses and the like. I have never had an electrical issue yet with my 2014 Interstate, but today I had some time and thought I would investigate the EMS system. I have discovered that I apparently was not provided the EMS manual supplement when I purchased my AI. The regular Interstate Owner's Manual provides some info on the EMS, but surprisingly, it does not specify the location of either the house circuit breakers or the fuse panel. I have looked in the likely places and I can't find them. Can someone help a relative newbie with the location of those important elements so I can be better prepared for our next road trip?

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Old 03-22-2015, 01:48 PM   #2
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2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,085
Under the front of the sofa you should see a door, hinged at the bottom. Open that door. Then left to right you've got the real main disconnect (the remote disconnect operates this one), the 12vDC house fuses, the 120vAC circuit breakers, and the inverter/charger.

You should have additional "house" fuses in the pedestal under the driver's seat, for things that were added by Airstream but powered off the chassis system— such as your retractable step by the sliding door.

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Old 03-22-2015, 06:49 PM   #3
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2013 Interstate Coach
Fulton , Maryland
Join Date: May 2010
Posts: 1,557
What Airstream calls an EMS (Energy Management System) is know as a Power Control System by its manufacturer, Precision Circuits Inc. (PCI).

I'm attaching a copy of the owner's manual and wiring diagram I downloaded from PCI's webpages.

Hope this helps,
- - Mike
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