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Old 07-08-2014, 11:04 PM   #1
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Elect Help

I just got back from my first run in my 1992 Thor Challenger. was a good trip . some issues with tires but otherwise great fun. I now do not have any 12 volt dc. if I am hooked to shore power all good. but when not running gen or hooked to shore power no 12 volt dc items work. any thoughts?
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Old 07-08-2014, 11:30 PM   #2
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You might have the battery shut off switch off. It's usually near the door. Also check house battery and it's connections. Clean all connections, including ground connection.

When you are hooked up to shore power, you are getting 12 v power from your converter/charger. When not connected, you should get power from house battery(ies).
It could be bad batteries or converter/charger might not be charging so they are dead.
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Old 07-09-2014, 02:17 PM   #3
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Check your house batteries with a meter.

With shore power or generator power the meter should read either about 13.4 v or 14.4 v depending on state of charge of the battery. If it does not, then charger is likely not working.

As said above, check your house battery shut off switch to be sure it is on.

Check your battery without external power source. It should read between 12.0 and 12.6 v to have enough charge to run things. If it does not then the charger or batteries are suspect.

I would assume the alternator is ok since you drove the rig home. Many rigs alternator also charges the house batteries with priority to chassis batteries.
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