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Old 09-01-2016, 11:34 AM   #11
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My hubby said he hooked black to black and white to white so it should be parallel not series right? We are using deep cycle marine batteries...would that make a difference?
A better way to be sure is by identifying the battery terminals... positive to positive... and negative to negative.



Using deep cycle marine batteries will make no difference and are what you should be using.
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Old 09-01-2016, 11:41 AM   #12
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For parallel connection the batteries need to be hooked positive to positive and negative to negative then the camper. Here is a simplified diagram.
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Old 09-01-2016, 11:56 AM   #13
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Here is the diagram he followed to hook up the batteries.
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Old 09-01-2016, 12:52 PM   #14
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If we damaged the circuit board would it still work properly with one battery? Everything works perfect until we try to use 2 batteries in parallel.
If that is so, it suggests to me that either you are wiring the second battery in correctly or the second battery is defective from the original bad polarity connection that may have damaged it Beyond use to the point that it is sucking the system dry when you put it in
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Old 09-01-2016, 01:00 PM   #15
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My hubby said he hooked black to black and white to white so it should be parallel not series right? We are using deep cycle marine batteries...would that make a difference?
It seems like it might be safe or at least better to forget the cover. Read the plus and minus on the battery post. Plus goes to plus and minus goes to minus. Follow the wires. Minus wire goes to frame. And usually fairly near the batteries. Plus wire goes hopefully to a main power switch then to the electrical distribution panel.

Get a voltmeter be sure you're reading positive and positive together negative and negative together negative to the frame should be no voltage positive with a voltmeter connected to the frame should read 12 + volts. I know for a lot of people electrical can turn their head around if they are not thinking it through very carefully. It's an easy place to mess up if you just Plunge in remembering for instance what it looks like on the old trailer. Good luck. Tom
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Old 09-01-2016, 01:12 PM   #16
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+ vs -

Sunds as if he has the same problem I had when I got the camper. I was adding the ower tongue jack. All my automotive experience has red * black -
Trailer had white and black didn't look at terminals closely, Hooked it up backwards. I still have to think hard what is "hot"
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Old 09-01-2016, 01:57 PM   #17
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The converter has fuses to protect it (inside the unit itself) from reverse polarity. Blows them every time. Fix that first and then open the furnace and check the red LED diagnostic light to see if it is showing a fault code (blinking). The furnace should have a guide posted in side as to what the code is. Usually a switch that can be reset manually or if you have my luck something not so easy.
If you also have an inverter they are also fuse protected in the same way. Disconnect the batteries and fix these first if they are blown or you will have issues that will make you crazy. As others have said, positively identify your positive and negative connections or big trouble will trouble you.
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Old 09-01-2016, 05:21 PM   #18
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Red face Start from the beginning

Why don't you try starting from the beginning. That's what I always did going on a service call
1. Is the thermostat set to the lowest temp?
2. Are both batteries good (Reading at least 12 volts) Verify all cells are good.
3. Restore the battery wiring as it was at first.
4. Check voltages when charging, not charging and under load (run something 12vdc)
5. If all is good connect the battery to the existing battery by placing the wire ring on the battery post neg to neg, pos to pos without removing any of the existing wiring.
6. Now try it and see what it does.

Good luck
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Old 09-01-2016, 07:13 PM   #19
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Furnace won't turn off

Thank you so much everyone for your help. It ended up being a thermostat issue. He did a power on/ off sequence to reset it and all seems good now.
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Old 09-02-2016, 07:22 AM   #20
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Thank you so much everyone for your help. It ended up being a thermostat issue. He did a power on/ off sequence to reset it and all seems good now.

Good! Now go camping!!!!!
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