1995brave
San Antonio, TX
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Joined: 01/24/2006
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As long as everything was turned off when you connected the battery it should be okay. The main concern would be the converter, did it or did it not blow when the battery was connected backwards. The reverse polarity protection is probably in it. To check, leave everything turned off, connect your voltmeter up to the battery and take a reading, while still connected plug in the converter and check the voltage should jump up to at least 13.6 volts. If no change check converter for fuses, if none you blew the converter.
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boosTT
Milwaukee
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Joined: 03/03/2012
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I did the same thing last year. I blew my brake controller!! Otherwise, I replaced a few fuses and everything was fine.
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skipnchar
Topeka or somewhere else
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Joined: 12/17/2003
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The reasons the fuses are there in the first place is to protect sensitive equipment. replace the fuses and everything SHOULD work as it's supposed to.
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jyh818
Chino, CA
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I just disconnect the negative terminal only during storage. That way, there is only one wire to reconnect and no change of reversing.
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passport2590bh
Florida
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Made the same mistake and yes, the fuse in the radio is probably blown too. One of those mistakes you only make once 
2006 5.7L Ram 1500 Hemi Mega Cab
2011 Keystone Passport 2590bh GT
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gijoecam
Midwest
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If the converter is equipped with reverse polarity protection fuses, and those are the fuses you blew, simply correct your error, replace the fuses, and go camping! The only thing it cost you was two fuses, and a lesson-learned.
If, in fact, your converter got cooked by your error (which is unlikely at best), now is your opportunity to replace it with one that has good three-stage charging and reverse polarity protection. They're not terribly difficult to find, and not too tough to replace, even for a shade-tree mechanic.
To prevent it in the future, tags with labels, and/or diagrams and/or colored electrical tape are handy markers.
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steelpony5555
Copperas Cove Texas
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Verizon uses the same wiring colors on their batteries in those boxes you see in your neighborhood. Well one day in a hurry changing out the batteries in one I wondered why the thing started to smoke. Yep I did the same thing black to neg and white to pos. but there was no circuit breakers going from the batteries. A lot of people were out of phone service for a few hours till we got some replacement circuit cards and power supply for it. Learned to take my time after that.
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Bennypup
Woodinville Washington
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There's a guy on the Keystone forum that just did the same thing. If after you but it back together it blows the fuses again call the manufacture of the converter. It looks like he's getting his replaced under warranty as the fuses should have protected the converter.
B
2010 Cougar 24RKS
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RWDIII
Casa Grande,AZ; Lakewood CO
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Been there,done that and got the T shirt
I now only lift one side when I store it.
the reverse protection works pretty good.
One learns from experience.
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fla-gypsy
North Florida
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Reconnect correctly and change fuses and see. Can't do any more harm at this point. You may have gotten lucky and you surely will not do it again
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