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Old 03-05-2016, 07:55 PM   #11
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My converter has some fuses in the DC fuse panel that all blow when the battery is reversed.

Don't ask how I know.
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Old 03-05-2016, 08:11 PM   #12
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Norty1 is right, although I have yet to blow the revers polarity fuses.. but there were a few others that went to the fuse grave yard.

Check ALL your fuses with a digital meter. There are a lot of members that spent hours troubleshooting electrical problems because the fuse looked ok. The fuse panel should show (labeled) the 2 reverse polarity fuses. Also the MAIN fuse located by the battery may have blown also. Again, use a meter to check them and you may save a lot of time and frustration.

One additional suggestion, get a piece of red tape and put it on the lug end of the positive battery cable so it does not happen again.

Don
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Old 03-05-2016, 08:15 PM   #13
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There were 4 in my converter that were blown. I purchased indicator fuses in the same rating to replace them. They glow when they are blown.

http://www.littelfuse.com/industries...tor-fuses.aspx
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Old 03-05-2016, 08:19 PM   #14
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I keep hearing about the reverse polarity fuses. I had 2 X 40 Amp fuses blow and I replaced them with automotive type fuses. Will automotive type fuses work and are these what you are referring too? Or am I missing something? I checked the other fuses with a multimeter and also changed the 30 amp fuse by the battery as a precaution. I agree with labeling the cables for sure, I have never owned a trailer and should have obviously been much more careful!!
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Old 03-05-2016, 08:21 PM   #15
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Looking at the WFCO converter specs. (If your converter is a WFCO, looks like it in pictures at Jayco site)
The fuses are a fast blow fuse.
I wouldn't be concerned right now about it, just don't reverse the battery again until you put in the correct fuses.
Robot Check
Snip.....
NOTE: If the reverse battery protection fuses are blown during installation, be sure that the battery has been connected properly, then

replace the fuses with ATC “Littelfuse ” Type 257 with the same
rating as the original.
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Old 03-05-2016, 08:43 PM   #16
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Mod note: There were 2 separate threads on this same problem. They are now combined into one to prevent duplication.
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Old 03-05-2016, 08:58 PM   #17
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It would help to specify the power converter;
WFO would have the reverse fuse on the 12 volt side of the electrical panel.

Progressive Dynamics on the power converter itself. You have to remove the Electric panel in order to get to the power converter. (all have 40 amp-some have 1 fuse; some 2; some 3 depends on the capacity of the converter)
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Old 03-06-2016, 06:00 AM   #18
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ALJO, I will be looking at it more closely this morning and will post which one it is once I get a closer look. I ran out of daylight quickly yesterday so I called it so there were no more problems. Thanks!!
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Old 03-06-2016, 06:14 AM   #19
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Good point ALJO. Mine is a PD but that could be his problem. Need to read up on the converter manual.
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Old 03-06-2016, 07:10 AM   #20
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His is a WFCO. It has 2 40's
My PD has 4 25's
Other PD's have 2 30's or 3 25's.

Plus you can see it is a WFCO in Jayco's 360 view.
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