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Old 09-03-2012, 11:53 AM   #1
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12v not reaching coach

2003 itasca sunova... 12v not communicating with the coach. All batteries fully charged, all fuses are good, all circuits on...when plugged in, coach lights up, when unplugged... Nothing! Problem occurred when running generator... With a/c running, tv running and turned on microwave. Can't trace where the problem is.... Any suggestions? Btw in 106 degree temps... Any quick help would be much appreciated!!!!!!
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Old 09-03-2012, 12:34 PM   #2
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Have you checked your coach disconnects it will cut all battery power if it's off
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Old 09-03-2012, 12:48 PM   #3
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Originally Posted by nightriderrv
Have you checked your coach disconnects it will cut all battery power if it's off
I am assuming you mean the on/off switch for the batteries... And if that is so, yes... It is in the on position.
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Old 09-03-2012, 01:16 PM   #4
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Check the circuit breakers on the gen set.
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Old 09-03-2012, 01:20 PM   #5
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Check the circuit breakers on the gen set.
Excuse my ignorance... Would that be on the generator itself? If so, will it look like a normal breaker?
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Old 09-03-2012, 01:26 PM   #6
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Since it worked while plugged in to shore power, then nothing when disconnected, it sounds like your batteries are not connected, your 12 v power was coming from inverter/charger only. Check battery cables and connections, including ground cable.
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Old 09-03-2012, 01:35 PM   #7
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Since it worked while plugged in to shore power, then nothing when disconnected, it sounds like your batteries are not connected, your 12 v power was coming from inverter/charger only. Check battery cables and connections, including ground cable.
The generator will not start either now, would this be a symptom of the inverter as well?
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Old 09-03-2012, 01:44 PM   #8
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The generator will not start either now, would this be a symptom of the inverter as well?
It means that there is an open in the 12 volt line from the batteries to the starting motor or windings in in the gen if it does not have a starting motor.

Check you battery connections to the frame and to the disconnect. You have a bad connection somewhere if your batteries are OK. Have them load tested.
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Old 09-03-2012, 01:45 PM   #9
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Sounds like a symptom of dead house batteries.
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Old 09-03-2012, 01:46 PM   #10
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Yes, the generator works off the the coach batteries, so it sounds like your batteries are not connecting to the coach. Check cables and battery disconnect solenoid. Sometimes a gentle tap on it can help it connect.
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Old 09-03-2012, 01:53 PM   #11
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Sounds like a symptom of dead house batteries.
House batteries are fully charged.
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Old 09-03-2012, 01:54 PM   #12
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Jump the solenoid with a jumper cable to see if the coach comes back on also when the switch is turned off and on you should hear it click or pop when solenoid is pulled in
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Old 09-03-2012, 01:58 PM   #13
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House batteries are fully charged.
Maybe.
Two months ago my chassis battery had 12.8 Volts but as soon as I put the smallest light bulb on it it would go to about 2 volts. The engine would not start either and it had been running just minutes before.
Replaced battery and she started right up.
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Old 09-03-2012, 02:03 PM   #14
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Maybe.
Two months ago my chassis battery had 12.8 Volts but as soon as I put the smallest light bulb on it it would go to about 2 volts. The engine would not start either and it had been running just minutes before.
Replaced battery and she started right up.
Engine starts with no problem. The coach is only experiencing the issues.
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