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Old 09-30-2014, 09:44 AM   #1
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Camper battery not charging while driving?

I have a 2013 ford F150. Recently, I decided to check the camper battery voltage while hooked up to the running truck. I've always assumed it would get 12 volts from the truck, therefore it should of read about 13 volts. It was only at 12.6 which tells me it's not getting current from my tow vehicle.

Is this typical or should I contact my truck dealer?? It has the standard big round plug.
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Old 09-30-2014, 10:19 AM   #2
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Not completely sure what your asking, but if your reading the static voltage of your camper battery, a fully charged battery will read 12.7V. So, your bat is near fully charged.
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Old 09-30-2014, 10:19 AM   #3
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X2
I always assumed the truck kept the rv battery charged also so now I'd like to know also.
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Old 09-30-2014, 10:24 AM   #4
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Only if you install the power relay in the engine compartment fuse box.

This relay not installed from the factory.

Look in your owners manual under towing and auxiliary power to towed unit.

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Old 09-30-2014, 10:27 AM   #5
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Quote:
Originally Posted by boatnut View Post
I have a 2013 ford F150. Recently, I decided to check the camper battery voltage while hooked up to the running truck. I've always assumed it would get 12 volts from the truck, therefore it should of read about 13 volts. It was only at 12.6 which tells me it's not getting current from my tow vehicle.

Is this typical or should I contact my truck dealer?? It has the standard big round plug.
Measure the voltage at your truck plug. If you are getting voltage at the battery pin, you will be charging your battery, however little it may be. I think you can measure across the 10 & 2 o'clock positions. Don't expect your truck to fully charge a dead trailer battery though.
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Old 09-30-2014, 10:27 AM   #6
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thanks f1100turbo I'll look this afternoon. I remember way back when I started towing with my truck putting some fuses in there when I put the Prodigy brake controller on so I maybe good to go, but I'll check on it.
thanks
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Old 09-30-2014, 10:30 AM   #7
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I have another question;
Will the trailer when tied to shore power charge the truck battery when its plugged into the trailer plug on your truck and trruck not running?
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Old 09-30-2014, 10:31 AM   #8
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thanks f1100turbo I'll look this afternoon. I remember way back when I started towing with my truck putting some fuses in there when I put the Prodigy brake controller on so I maybe good to go, but I'll check on it.
thanks
I think there was also a fuse that needed to be installed for the brake controller if you use factory plug.

Yes DO NOT EXPECT the tv to charge a dead battery like a charger would.

At best when running fridge while traveling it will keep up.

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Old 09-30-2014, 10:35 AM   #9
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Not completely sure what your asking, but if your reading the static voltage of your camper battery, a fully charged battery will read 12.7V. So, your bat is near fully charged.
True on voltage but if the battery still had a charge going to it, it should read a little over 13 volts or however much voltage the charging source is putting out, right?
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Old 09-30-2014, 10:40 AM   #10
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True on voltage but if the battery still had a charge going to it, it should read a little over 13 volts or however much voltage the charging source is putting out, right?
You have to think, there will be a voltage drop from the alternator to the trailer, especially going through several plugs along the way.
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