Electrical problem

[dat]

I have no 12v power in my trailer, the battery is ok, the 120v works fine just no 12v power.

[chuck&gail]

So you have no inside lights, right? They run off 12 VDC.

12 volt power comes from two seperate places. If connected to shore power, it comes from the converter (which usually has a circuit breaker on input).

With no shore power it comes from battery. Usually there is a circuit breaker on the frame near the battery. There are often fuses in the electrical panel (where circuit breakers and fuses are).

Pick one, and troubleshhot. IMHO the battery only supply is the easiest to check with your voltmeter (shore power disconnected).

[alaskalife]

The most common problem seems to be the self-resetting breakers somewhere around the battery. Disconnect 120 and battery then re-apply power.

If still no go, check battery disconnect switch. Mine recently went bad and I was confused to what could be left...I had forgot I had this switch, mine isn't near the battery. So, I pulled it out and bypassed it by puuting both wires on one terminal.

Never use the switch, so bypassing not an issue for me.

[Bruzer 71]

So this would mean the self resetting beaker is defective if no power getting to the trailer. There is no way to manually reset it correct ?

[campingcpl]

Originally Posted by dat

I have no 12v power in my trailer, the battery is ok, the 120v works fine just no 12v power.

If you have no 12v when even connected to shore power there is a bigger problem then just a self resetting breaker because these breakers are only used for the battery and wouldn't affect 12v power while connected to shore power. I would start by looking to make sure you are getting 12v power to the power center. If there is power then I would check all the fuses to make sure there isn't a bad fuse. If all fuses are good then I would start looking at possibly a bad fuse board or possibly a bad connection in either the power or ground wire for the power center.

Originally Posted by Bruzer 71

So this would mean the self resetting beaker is defective if no power getting to the trailer. There is no way to manually reset it correct ?

The self resetting breaker is just that, so no there is no manual rest to it. When power is removed from the breaker or the reason for the breaker to trip is remedied it will reset. If you have no 12v on just battery power then it could be one of those breakers, a bad ground, bad battery, loose connection, etc..

[Bob Landry]

The original post would indicate that he is plugged into shore power since he states he has 120VAC. That being the case, all of the 12VDC power will come from the converter. Nothing happens with the battery when on shore power other than being charged by the converter. If he has no 12V onSP, then either the breaker feeding the converter needs to be reset or he has a defective converter.

[campingcpl]

Originally Posted by Bob Landry

The original post would indicate that he is plugged into shore power since he states he has 120VAC. That being the case, all of the 12VDC power will come from the converter. Nothing happens with the battery when on shore power other than being charged by the converter. If he has no 12V onSP, then either the breaker feeding the converter needs to be reset or he has a defective converter.

If the converter breaker was off or the convert was bad then 12v power would come from the battery still giving them 12v power. The breaker for the converter will stop the converter from putting out a 12v charge but wont stop the 12v from coming into the power center from the battery. If they have no 12v period then there is a more serious electrical issue then just a breaker or a bad converter. Now if the convert was bad and there wasn't 12v coming from the battery for some reason then of course there wouldn't be any 12v.

[Bob Landry]

Originally Posted by campingcpl

If the converter breaker was off or the convert was bad then 12v power would come from the battery still giving them 12v power. The breaker for the converter will stop the converter from putting out a 12v charge but wont stop the 12v from coming into the power center from the battery. If they have no 12v period then there is a more serious electrical issue then just a breaker or a bad converter. Now if the convert was bad and there wasn't 12v coming from the battery for some reason then of course there wouldn't be any 12v.

He does not need the battery connected when on shore power. He can disconnect the battery and if there is no 12V in the trailer, then he's back to the possibilities I listed.

[f6bits]

It’s been ten days and the original poster hasn’t been back. I’d say we’re dead in the water unless they can provide more information.