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01-31-2020, 08:39 PM
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#1
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Senior Member
Join Date: Dec 2015
Posts: 299
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12v system only works when plugged in?
I know there was a thread on this someplace but I can't find it? Today I pulled all the batteries to do maintenance and pulled the breaker box to replace a bad GFI breaker that went bad. Now I don't have any 12v lights etc unless I'm plugged in. I do have power to the jacks and slides. I checked the breaker (fuse?) by the batteries and it seemed OK. I might have screwed something up when I pulled the breaker box because its a REALLY tight fit. I checked each battery and the inteli-power charger and they are fine. Other then that I'm stumped.
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Glenn 2008 36TK3 #4571
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02-01-2020, 05:09 AM
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#2
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Senior Member
Join Date: Oct 2017
Location: Germantown, Tennessee
Posts: 716
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The odds are that your 'reverse polarity' fuses are blown from the battery cables being inadvertently touching the wrong post. It can happen to the best of us, and it happens so fast that you don't know it even happened. They are usually located in your power center. Keep us informed...
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Jim and DW 50 years Brenda
2018 40rssa and 2021 Jayco Eagle 40'
2019 F450, ruby red
Harley Road King & sidecar
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02-01-2020, 08:15 AM
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#3
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Senior Member
Join Date: Dec 2015
Posts: 299
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Thanks Jim, I'm going to take a look today. To be honest I don't know what I'm looking for, never heard of reverse polarity fuses. I'll post back later today.
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Glenn 2008 36TK3 #4571
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02-01-2020, 09:11 AM
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#4
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Senior Member
Join Date: Oct 2017
Location: Germantown, Tennessee
Posts: 716
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Jim and DW 50 years Brenda
2018 40rssa and 2021 Jayco Eagle 40'
2019 F450, ruby red
Harley Road King & sidecar
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02-01-2020, 06:09 PM
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#5
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Senior Member
Join Date: Dec 2015
Posts: 299
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OK, I'm an idiot! I don't know how it happened but the battery shut off switch was pushed in. The only reason I'm posting this is so maybe someone else will learn by my mistake.
I also want to add that my 08 doesn't have reverse polarity fuses that I could find. The only fuse I saw was the one by the battery but it checked out. Again, thanks
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Glenn 2008 36TK3 #4571
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02-02-2020, 04:15 AM
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#6
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Senior Member
Join Date: Oct 2017
Location: Germantown, Tennessee
Posts: 716
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I'm surprised that yours doesn't have one/two. This is what it should look like on a typical unit:
And thanks for the update, we've all done things like that!
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Jim and DW 50 years Brenda
2018 40rssa and 2021 Jayco Eagle 40'
2019 F450, ruby red
Harley Road King & sidecar
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02-02-2020, 06:13 AM
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#7
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Senior Member
Join Date: Feb 2013
Location: on the road
Posts: 1,188
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Hey we all feel like idiots at times!
As a friend always tells me start with the basics!
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2015 RAM LongHorn Dually Air ride Aisin 4:10's
2016 MS 39TKSB3 "Highly Elited"
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02-02-2020, 08:27 AM
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#8
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Senior Member
Join Date: Dec 2015
Posts: 299
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Quote:
Originally Posted by Notanlines
I'm surprised that yours doesn't have one/two. This is what it should look like on a typical unit:
And thanks for the update, we've all done things like that!
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Jim, I have a row of horizontal breakers and a vertical row of 12v fuses. I don't have the two separate fuses shown. I even pulled the cover off to see if they were hiding them lol.
Quote:
Originally Posted by Cummins12V98
Hey we all feel like idiots at times!
As a friend always tells me start with the basics!
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That's good advise from your friend. I just never thought of the shut off switch because I never use it. At home here I'm parked by the house plugged in and on the road I'm usually plugged in or using my generator.
PS, my new pads will be here tomorrow.
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Glenn 2008 36TK3 #4571
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02-02-2020, 01:27 PM
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#9
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Senior Member
Join Date: Feb 2013
Location: on the road
Posts: 1,188
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My new to me Harley would not start. The "Friend" walked by and said "did you check the battery connections". I replied the previous owner had put in a new battery recently. YEP connections were loose!
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2015 RAM LongHorn Dually Air ride Aisin 4:10's
2016 MS 39TKSB3 "Highly Elited"
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02-25-2020, 08:28 AM
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#10
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Senior Member
Join Date: Jun 2009
Posts: 457
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Quote:
Originally Posted by oldbird
I also want to add that my 08 doesn't have reverse polarity fuses that I could find. The only fuse I saw was the one by the battery but it checked out. Again, thanks
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Do you have a Progressive Dynamics battery charger aka converter?
The PD converters have 3 fuses to protect from reverse polarity.
Other brands such as Iota have them as well.
The converters have changed over the years (acquisitions, product changes etc)
Look at this manual for the PD 9100 charger, last page specifically.
https://www.progressivedyn.com/wp-co...al-english.pdf
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Thanks,
Duane
2019 DRV MS 39DBRS3 ---> Flexible Flyer
2020 F-450
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02-25-2020, 10:01 AM
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#11
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Senior Member
Join Date: Dec 2015
Posts: 299
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Thanks and yes, I checked those three fuses and they were all good. Even checked with a multimeter to make sure.
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Glenn 2008 36TK3 #4571
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12-23-2020, 03:11 PM
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#12
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Senior Member
Join Date: Sep 2011
Location: Sharpsburg (ATL) GA
Posts: 196
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Old bird and I have antiques. Our fuses for polarity are in the power converter
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JUST ANOTHER DEPLORABLE
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12-25-2020, 08:40 PM
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#13
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Junior Member
Join Date: Jan 2019
Posts: 9
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Like Cummins 12V said when I am asked a question that I know the answer I say, I don't know what you know so we will start at the beginning and if you know more we can go forward. The answer usually is I know nothing. Now we can figured the fix better. labarn or chevman
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