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05-05-2021, 02:44 PM
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#1
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Senior Member
Join Date: May 2012
Location: Near Toronto, Ontario Canada
Posts: 173
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Electrical question 12v fuse
Any electrical geniuses here?
The is an inline 30a fuse for the neg connection to my battery. It blows as soon as I connect to the battery.
Entire 12v system works fine with truck connected or 110v cord plugged in.
I have no idea whatsoever where to start looking for the problem!
Help!
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05-05-2021, 03:21 PM
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#2
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Senior Member
Join Date: Jun 2020
Location: Tooele, Utah (Two-Willa)
Posts: 182
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It needs to be on the positive terminal.
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__________________
The name's Jeff
2005 Fun Finder T139FK
2021 Jeep Gladiator Mojave JT
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05-05-2021, 03:29 PM
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#3
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Senior Member
Join Date: May 2012
Location: Near Toronto, Ontario Canada
Posts: 173
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Thanks, but its always been to the neg terminal and has worked fine in the past. Something probably got water into it over the winter, I don't know.
PS: I was curious about the neg vs pos for the fuse, and everything I read online confirmed the fuse belongs on the neg.
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2012 FF 214WSD and Equalizer WDH
2019 GMC Sierra SLT, Crew Cab, 4x4
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05-05-2021, 10:55 PM
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#4
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Senior Member
Join Date: May 2012
Location: Near Toronto, Ontario Canada
Posts: 173
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Quote:
Originally Posted by Xerofall
It needs to be on the positive terminal.
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You may be on to something! I am starting to thing I dropped the battery in backwards which would explain everything. Going to look in the morning and see. Seems I may have misread online re the neg vs pos as well....
Will report back tomorrow......
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05-07-2021, 10:28 AM
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#5
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Senior Member
Join Date: May 2012
Location: Near Toronto, Ontario Canada
Posts: 173
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I guess its time to hang my head low.....
Whole problem solved by hooking the battery up properly! The fuse to prevent damage from reversed polarity did its job.....
I've been taking the battery out for winter and re-installing for 15 years, so you'd think I would have noticed that I dropped the battery into the box "backwards" and proceeded with hooking up the wires.
Oh well, and of course the fuse belongs on the pos side.
So add me to the group here who often say "don't ask me how I know"
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2012 FF 214WSD and Equalizer WDH
2019 GMC Sierra SLT, Crew Cab, 4x4
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05-07-2021, 01:47 PM
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#6
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Senior Member
Join Date: Jun 2020
Location: Tooele, Utah (Two-Willa)
Posts: 182
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Glad you got it working.
__________________
The name's Jeff
2005 Fun Finder T139FK
2021 Jeep Gladiator Mojave JT
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05-07-2021, 03:21 PM
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#7
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Senior Member
Join Date: May 2012
Location: Near Toronto, Ontario Canada
Posts: 173
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Quote:
Originally Posted by Xerofall
Glad you got it working.
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Thanks. Forehead is a little sore from slapping my hand on it!
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05-09-2021, 12:16 PM
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#8
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Senior Member
Join Date: Jan 2012
Location: South Dakota
Posts: 3,106
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Easy to do if the battery used is not marked + or - near the battery posts....or if both battery posts are the exact same size. Sometimes the + post is slightly larger than the - post.
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2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.
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05-09-2021, 12:33 PM
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#9
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Senior Member
Join Date: May 2012
Location: Near Toronto, Ontario Canada
Posts: 173
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Quote:
Originally Posted by Eagle
Easy to do if the battery used is not marked + or - near the battery posts....or if both battery posts are the exact same size. Sometimes the + post is slightly larger than the - post.
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Oh I wish........ They are quite well marked.
Just wasn't paying attention. Been doing this for years without problems. Just not paying attention. Sigh....
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05-09-2021, 12:38 PM
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#10
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Senior Member
Join Date: Jan 2012
Location: South Dakota
Posts: 3,106
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Proof that not paying attention = accidents.
And accidents happen but yours wasn't serious so be thankful.
__________________
__________________
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.
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