thru batteries again
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Intermediate
Joined: Sep 2012
Posts: 28
Likes: 0
From: uk
thru batteries again
I have another dead battery last a month! Now won't hold charge.
Everything electrically is new and includes wiring regulator stator starter ign battery earth straps all of which run through a motogadget m unit v2 box bike sta rats first push and runs great only problem is that I am now on my 5th battery as they go flat and won't recharge or melt terminals all run on optimate or oxford 900 tender charger ??
I cannot find the culprit or reason it does this but bike is 89 evo everything has been checked over and over .
Does anybody have any help to solve please.
Everything electrically is new and includes wiring regulator stator starter ign battery earth straps all of which run through a motogadget m unit v2 box bike sta rats first push and runs great only problem is that I am now on my 5th battery as they go flat and won't recharge or melt terminals all run on optimate or oxford 900 tender charger ??
I cannot find the culprit or reason it does this but bike is 89 evo everything has been checked over and over .
Does anybody have any help to solve please.
Stellar HDF Member
Joined: Jan 2009
Posts: 2,578
Likes: 463
From: On a Lake, not far from the Gulf
There is a parasitic drain that is discharging the bike faster than the tender can replenish it.
Start with a good charging system test:
https://www.hdforums.com/forum/evo-c...ng-system.html
Then search for the circuit causing the drain:
There is also an Evo sub forum here with a lot of knowledgeable people:
https://www.hdforums.com/forum/evo-classic-models-84/
Start with a good charging system test:
https://www.hdforums.com/forum/evo-c...ng-system.html
Then search for the circuit causing the drain:
There is also an Evo sub forum here with a lot of knowledgeable people:
https://www.hdforums.com/forum/evo-classic-models-84/
Outstanding HDF Member
Joined: Dec 2012
Posts: 2,557
Likes: 235
From: Texas
too many variables...check the current draw and go from there. It could be something as simple as a loose battery connection to your tender cooking the battery. Have you tried NOT using the tender?
Also, even a little corrosion can cause weird and elusive problems like this. Sometimes you just have to start pulling things apart and looking for something not right, and sometimes you cannot find anything wrong and it all works great when you get it back together. When that happens, you are in for a world of problems.
Good luck!
Also, even a little corrosion can cause weird and elusive problems like this. Sometimes you just have to start pulling things apart and looking for something not right, and sometimes you cannot find anything wrong and it all works great when you get it back together. When that happens, you are in for a world of problems.
Good luck!
Last edited by skinman13; May 21, 2017 at 09:19 AM.
Seasoned HDF Member
Joined: May 2008
Posts: 21,131
Likes: 12,691
From: South Carolina
No reason to use a battery tender on an `89 model bike unless it only gets ridden once a year.
Melting terminals is a symptom of a bad connection.
Perform a parasitic draw test.
Melting terminals is a symptom of a bad connection.
Perform a parasitic draw test.
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