Battery voltage drop
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Stage II
Joined: Nov 2019
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From: 34956
Battery voltage drop
I have a 2008 sportster XL1200 low. Battery voltage drops from 13v to 5v when I plug in the 30amp main fuse. Tried unplugging several things, still have the problem. Any thoughts?
Ultimate HDF Member
Joined: Aug 2010
Posts: 5,014
Likes: 739
From: Northern California
I would first check the battery and starter solenoid cables to make certain they are not damaged or grounding. Then I would test for "Shorts to Ground" http://www.cycleelectricinc.com/
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Stage II
Joined: Nov 2019
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From: 34956
I had my bike on a trickle charger for a few months and when I came home and tried to start it all the lights went out and nothing would work, thats when I started checking the electrical and discovered the voltage drop.
Seasoned HDF Member
Joined: May 2008
Posts: 21,143
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From: South Carolina
Forget the voltage drop for the time being, you have a dead battery.
First you need to charge the battery fully and have it load tested (it sounds like it is kaput).
While the battery is out, clean all the battery cable connections.
First you need to charge the battery fully and have it load tested (it sounds like it is kaput).
While the battery is out, clean all the battery cable connections.
Stellar HDF Member
Joined: Jan 2013
Posts: 3,466
Likes: 425
From: Illinois
If you had the battery on a trickle charger [not a battery tender] for a few months,you have ruined your battery.
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Tourer
Joined: Feb 2015
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From: Athens Greece
x2!!!!
common mistake trickle vs tender
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