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09-07-2020, 10:18 PM | #1 |
Gone Wild
Join Date: May 2016
Posts: 373
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Main Positive is Hot, Nut welded to the post?
I noticed tonight upon plugging in my charger a glowing spark from the nut on my main positive. I quickly unplugged the charger and the main positive post was hot. No other posts were hot. The nut seems welded to the post as I can’t take it off, feels like the post is going to snap if I apply more pressure.
The only wire connected directly to the post is for my volt meter. Everything else, including the charging positive is connected to a fuse? How is the post getting that hot without the fuse popping first? I did just wash the batteries today with water and baking soda, but I still can’t figure out why this is happening. I’ll ruin the battery, break the post off if I try to get the nut off. Not sure what to do. ETA. You can even see the nut is black from getting hot previously. I think it could have caught on fire tonight if I hadn’t happen to see it glowing. Suggestions? Pic attached showing all the power comes and goes through the fuse. |
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09-07-2020, 10:26 PM | #2 |
Gone Wild
Join Date: May 2016
Posts: 373
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Re: Main Positive is Hot, Nut welded to the post?
The digital volt meter stays on 24-7, but it’s never been an issue for over 2 years now. The post only got hot when I plugged in the charger. Been driving the cart all afternoon with no issues.
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09-07-2020, 11:21 PM | #3 |
Gone Insane
Join Date: Oct 2016
Location: Richmond, VA
Posts: 14,214
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Re: Main Positive is Hot, Nut welded to the post?
I suspect you have a poor connection there somewhere. Clean it up and do away with that bar thing if you can.
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09-07-2020, 11:21 PM | #4 |
Just Gone
Join Date: Sep 2015
Location: North Carolina
Posts: 3,549
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Re: Main Positive is Hot, Nut welded to the post?
That nut wasn't tight enough, causing a loose connection or there's an internal loose connection in that cell causing some major resistance (heat).
If the nut's welded to the post you may have to drill and tap a new stud in the flat lead area next to that stud. |
09-07-2020, 11:27 PM | #5 |
Gone Wild
Join Date: May 2016
Posts: 373
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Re: Main Positive is Hot, Nut welded to the post?
I constantly torque the nuts, clean with baking soda, and spray with the red anti corrosive spray. That one nut is seized solid and getting hot. Still don’t understand how that much heat can happen when the charging wire is coming through a fuse, and not blowing the fuse?
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09-07-2020, 11:30 PM | #6 |
Gone Wild
Join Date: May 2016
Posts: 373
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Re: Main Positive is Hot, Nut welded to the post?
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09-07-2020, 11:44 PM | #7 |
Gone Wild
Join Date: Apr 2020
Location: 1000 Oaks, SOCAL
Posts: 424
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Re: Main Positive is Hot, Nut welded to the post?
That "bar thing" looks like the main fuse that Alltrax ships with their controllers and is required according to the XCT IQ Wiring Diagram.
I didn't like idea of mounting it on the battery post, mostly because it looks like it would get in the way, so I mounted it on the frame rail. |
09-08-2020, 12:04 AM | #8 | |
Gone Wild
Join Date: May 2016
Posts: 373
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Re: Main Positive is Hot, Nut welded to the post?
Quote:
Thanks NCPW, obviously that’s the issue. |
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09-08-2020, 12:09 AM | #9 |
Gone Insane
Join Date: Oct 2016
Location: Richmond, VA
Posts: 14,214
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Re: Main Positive is Hot, Nut welded to the post?
Well it's not clean looking and you have what looks like a small connection to something under your main connection.
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09-08-2020, 12:39 AM | #10 | |
Gone Wild
Join Date: May 2016
Posts: 373
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Re: Main Positive is Hot, Nut welded to the post?
Quote:
With that said, instead of tapping the battery, would something like this work to securely reconnect the system? |
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