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Old 07-16-2014, 07:57 PM   #1
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Join Date: Apr 2013
Location: Nanoose Bay, BC
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No power to anything without engine running

I got a problem, just took the RV out of shop to go on a trip, all batteries are good and started fine, however I can get nothing to run off battery or shore power ? Everything works with main engine running but when it shuts off everything else does too including generator. Its a 2005 Itasca Merdiaina 39' cat 350. All circut breakers are in (nothng popped out), main breakers are all on, inverter/converter clicks when plugged into shore 110 outlet and can hear it slightly humming. Tested all batteries with load test as well as hydrometer. Im suspicious of the AUX battery switch on dash as its acting like this swith is in the off position but dont know if that switch kills power to interior stuff when main engine running as well ?? Anyone with ideas please let me know.

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Old 07-16-2014, 08:57 PM   #2
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Location: Powell River, B.C.
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If the , salesman switch on my coach is flipped or the relay defective , all interior lights would operate with the engine running. The BIRD charging system would activate and by trying to charge the coach batteries , power up the interior.

Salesman switch is a different one than the aux start. Mine is inside a cabinet above the stairs to the entry door.

EDIT: Salesman switch, could ( should ) be labeled battery disconnect ; and only works on the coach battery. Shop worker may have hit the switch to keep your batteries from being drawn down, while waiting for you to pick the rig up.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 07-17-2014, 06:04 AM   #3
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x2 with Skip.
If you have a Bird System this is how it functions.
Your battery cut off switch, which you may operate when not using coach to conserve battery charge and a salesman switch need to be on when coach is in use.
This link may help also.
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
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