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Old 04-10-2015, 01:05 PM   #11
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wmtire, I don't remember what color the wires are but I will find out tonight, I very well may have them in reverse order. So the 40amp fuses are for if it was hooked up backwards? It is still plugged into the same 30 amp outlet and the exten. cord is a camper 30 amp cord. I will look tonight and make sure the red is on poss and the white is on neg. Thank you so much
Yes, the reverse polarity fuses are there to protect the converter.

What the converter does it to take 120 volt AC shore power, and convert it to 12 volt DC power. It then powers the things in your RV that work off of 12 volt DC power (lights, furnace, fans, lp detectors, fridge on propane, thermostats, water pump, etc). The converters other function is to recharge your battery. When you are connected to a form of 120 volt AC shore power, then all of the aforementioned will run off of the converter and not the battery.

When you are not on shore power, then these things run off of the battery direct. This allows you to camp at places where 120 volt AC power may not be available...as in boondocking or dry camping.

If you have the battery hooked up backwards, then it blows the fuses to the converter, and thus the converter cannot provide power to the 12 volt stuff......nor recharge the battery.

Your air conditioner, microwave, and all the 120 volt outlets all operate off of 120 volt AC power only. However, the thermostat that controls the air conditioner works off of 12 volt power.....so if you have no 12 volt power, then the air conditioner cannot function.......and neither can the furnace, as it's 12 volt only

Does your microwave and any of the outlets in the RV currently work, so we can verify that your incoming 120 volt AC power is working thru the extension cord?

Mark Polk has some good articles that may help you understand your RV's electrical systems.

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

http://rvservices.koa.com/rvinformat...d-amp-draw.asp
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Old 04-10-2015, 02:23 PM   #12
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Yes microwave and outlets and a few lights work along with the slides
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Old 04-10-2015, 03:33 PM   #13
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Like wmtire said the wires are mostly white and black different from a car hookup. Follow the wire that attaches to the frame of the trailer whatever color it is. Make sure that one is hooked to the NEG side of the battery. Now follow the wires from the 40 amp fuse that one should go to the positive what ever color it is. Lets hear the out come. Good luck.
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Old 04-10-2015, 06:04 PM   #14
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Yes microwave and outlets and a few lights work along with the slides
Trying to get my head on this. If I recall correctly, your DC slide motors will work if you have the battery cables backwards, but will operate opposite of it's usual way. Say you pushed the top of the button to run the slide out, and the bottom of the button to run the slide in.................. it would now slide in when pushed the top of the button and out when you pushed the bottom of the button.

This is assuming it's operating totally off of the battery and your converter isn't doing anything (the blown fuses).

Does any of our other members know this to be true, and if the DC motors would operate backwards if connected to a battery backwards.?

Let us know if you have a red/black or black/white battery wire combination. Also, have you charged this battery since installing it a few months back?
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Old 04-10-2015, 06:43 PM   #15
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wmtire, all dc motors I've played with will reverse direction if the leads are switched.
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Old 04-10-2015, 07:22 PM   #16
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wmtire, all dc motors I've played with will reverse direction if the leads are switched.
That's what I was thinking, as the DPDT switch itself is just reversing the polarity, to turn the motor in different directions. Something just wasn't clicking in my head. It happens a lot.
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Old 04-12-2015, 10:44 AM   #17
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Thanks guys, wmtire you were right I turned the battery around and everything started working after changing a few fuses. You guys are the best, very friendly site.
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Old 04-12-2015, 10:53 AM   #18
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This year when I pull my batteries I'm gonna make sure I label the "+" and "-" in my battery box, just to make it easier.. Typically I forget which is which and end up metering them in the spring - battery disc switch OFF and meter to the frame.. Only one (on mine) has continuity, which would be the negative..
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Old 04-12-2015, 02:58 PM   #19
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Thanks guys, wmtire you were right I turned the battery around and everything started working after changing a few fuses. You guys are the best, very friendly site.
Great to hear that you got it all working and it was something simple. It does happen a lot, especially when the battery wires are color coded with the black being positive and the white being negative.

It kinda runs counter-intuitive since most people are used to automotive batteries having the black wire as the negative.
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