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Old 12-03-2017, 07:55 PM   #1
pgm
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electrical issues

thjs is my first time owning a camper. i have a 2005 wildwood 335 BHBS fifth wheel. when i plug in shore power the only thing that works is the plugs. not sure if im doing something wrong or what. the heat or air wont work and the fridge wont either. do i have to change something when plugged into shore power or should it do it on its own. any help would be greatly appreciated.
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Old 12-03-2017, 08:19 PM   #2
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Do you have a microwave? If so, does it work?
I suspect you have a bad/dead battery or your battery disconnect switch is in disconnect mode. Those appliances you mention need 12v current from your battery at least for their thermostats.
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Old 12-03-2017, 08:30 PM   #3
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the battery is bad as we just had it tested tonight. wasnt sure if it needed it for the other stuff to work. no the microwave wasnt working either. also where would the battery disconnect switch be at
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Old 12-03-2017, 08:45 PM   #4
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If the battery is dead and you plug the RV in, the converter will try to charge it and may blow the 30-40 Amp fuses in the fuse panel. Check them. They are usually orange or brown. See attached photo. Also check the resettable breaker ( usually under the frame near the hitch). There is a button on the side of the breaker to reset it.
The AC, microwave, and tv are 120VAC ( shore power). The furnace, lights, water pump, Water heater control all operate on 12VDC ( Battery or 12V from converter).
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Old 12-03-2017, 08:52 PM   #5
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I suspect it doesn't have one. I had a 2009 Keystone that had none. My 2015 Wildcat is the first trailer I've owned that had one.

Microwave works off a standard plug. It shouldn't be affected by 12v problems. It may be unplugged OR it may have blown a fuse.

Bad battery will mess all those appliances up. I helped a fellow volunteer on a church building project determine that his A/C failure was due to a bad battery. We removed his bad battery and jumped from his truck battery to his trailer's battery cables and his A/C started!

Be very careful to hook up your cables correctly when you install a new battery. If you reverse the cables, you'll blow out two "Reverse Polarity" fuses in your power center (near the other fuses but not in line with them). Battery cable colors don't always match what you see in a car. Be sure the cable to the Neg. (-) post is attached to the frame/ground.


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Old 12-03-2017, 08:58 PM   #6
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I'm not familiar with your specific trailer, but to give you a rough idea of how it works.
You have 120 Volt (shore power) entering the trailer, this power goes into the converter panel where it supplies 120 Volt AC power for appliances like the air conditioner, microwave, tv, electric water heater and here is where it gets interesting, 120 Volt AC also enters the AC to DC converter where it gets transformed into 12 DC power for the slideouts, lights, propane furnace, LP gas alarm, landing gear and the battery charger. The AC outlets/appliances are protected by electric breakers like the ones you find in a house, the DC "appliances" are protected by automotive fuses.
These are two completely different systems. The air conditioner can be different because in many cases the thermostat for the furnace and the air conditioner are tied together and runs on 12 Volt DC power but the air conditioner itself is 120 Volt AC. Edit: This means the air conditioner may need both AC and DC power to function, again depending on the setup.

In most (many) rv's the 12 Volt side (lights, landing jacks ...) can get supplied directly from the converter, which may or may not a separate fuse behind the panel cover and does not need a battery. This means if your lights aren't coming on when the trailer is plugged into shore power there is probably no power going into the converter, check the 120 Volt breaker labeled 'converter'. If it is on and you know there is power going to the microwave and the tv then you probably have a dead converter that needs to be replaced. This could also be the reason why the battery is dead, because if the converter doesn't produce 12 Volt DC power then no DC power goes to the battery.

It can actually be a bit more complicated but this is it in a nutshell, however with many variations.

Try to post a picture of your converter panel with the manufacturer and model # if you can.
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Old 12-03-2017, 09:56 PM   #7
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I doubt that a 2005 Wildwood has a factory battery disconnect switch.
Unless a previous owner installed one.
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Old 12-04-2017, 05:39 AM   #8
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i have checked everything and was assuming the convertor was bad. the battery was dead before i plugged into shore power. I'm putting a new battery on it today. is there an easy way to tell if the convertor is bad after putting a new batery on it
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Old 12-04-2017, 05:40 AM   #9
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thanks to everyone for all the help. hope to get it figured out today
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Old 12-04-2017, 06:18 AM   #10
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Paul, can you provide a little more information, as there are so many variables at play here that could be affecting your outcome. I'll try to number them.

1. Is your RV of the 30 amp (3 prongs on the shore power cord) or the 50 amp (4 prongs on the shore power cord) type?



2. What are plugged into for shore power EXACTLY (ie, are you plugged in at your house, and if so are you using any kind of adapter on the shore power cord to accomplish such, using a generator, etc)? If using an adapter (especially on a 50 amp cord) is it store bought or of the home made variety?

3. If plugged into an outlet at your house, have you verified it has power by plugging something else in (you may have tripped a circuit breaker in your house of if using a GFCI protected outlet at the house, it's tripped as this happens a lot when plugging a RV into it). I will assume it does having power to the outlets, but want to absolute verify.

4. Is this your first time trying to use shore power since getting the RV? Have you located the RV's electrical distribution box (similar to what flybob showed in post #4) and verified all the circuit breakers there are turned on?

Two articles I suggest reading:

http://rvservices.koa.com/rvinformat...lectricity.asp

http://rvservices.koa.com/rvinformat...d-amp-draw.asp
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