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Old 05-15-2016, 05:33 PM   #1
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Reverse polarity protection

I have a 2012 Rockwood Signature Ultra Lite fifth wheel. I have power on the red wire at the battery and no power on the red wire at the fuse panel. What is in between? A sticker on the panel refers to "reverse polarity protection fuse" but doesn't suggest where it might be.
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Old 05-15-2016, 05:37 PM   #2
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check under your battery box
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Old 05-15-2016, 06:02 PM   #3
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There is nothing under the box. Wiring comes out of the top of the box and goes up into the body.
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Old 05-15-2016, 06:25 PM   #4
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The reverse protection fuses are in the converter panel.

Have you opened the junction box on the pin box to see if it goes through there?

I don't think there is any splices in the large power wire between the battery and converter.
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Old 05-15-2016, 06:25 PM   #5
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Is the battery disconnect in the out position. On my 8310ss its located next to the power distribution box. If it has been pushed in, that is the disconnect position.

The reverse polarity fuses are in the same section of the power distribution box as the rest of the fuses. On mine they are 2 40 amp fuses on the left of the row of the individual branch fuses.
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Old 05-15-2016, 06:39 PM   #6
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Assume you have a WFCO converter and panel. Check for two 30A or 40A fuses (yellow or orange) in your power control panel. Should be to the left of the row of lower current fuses.
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Old 05-15-2016, 06:44 PM   #7
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Quote:
Originally Posted by Flybob View Post
Assume you have a WFCO converter and panel. Check for two 30A or 40A fuses (yellow or orange) in your power control panel. Should be to the left of the row of lower current fuses.
X's 2 on that, there is a fuse type that go's to your plug for the trailer to but I agree check the two fuses I think they are 30 amp in the panel...
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Old 05-15-2016, 07:27 PM   #8
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Thanks for all the help. Those unnamed fuses in the panel are ok, all fuses are good. I haven't looked around the hitch area yet. I have no power right on the red wire at the panel so it disappears between the wire at the panel and the wire going into the body at the battery.
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Old 05-15-2016, 07:54 PM   #9
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If you look at post #16 in this thread it will show you some mini-breakers that are located between battery and either DC panel or other equipment. Look in the front of your fifth wheel for these somewhere and press small black buttons on breakers....

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Old 05-15-2016, 10:29 PM   #10
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The problem was a manual reset breaker in the pin box. The power wire goes from the battery to the goose neck, through a breaker and back to the fuse panel. That affected all interior equipment. Other wires come from the battery and go through breakers to landing gear and other near-by circuits and they were ok. Thanks for the ideas, it helped.
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