Electrical Problem
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Cruiser
Joined: Jun 2014
Posts: 177
Likes: 32
From: Beaufort SC
Electrical Problem
2011 FLHTC. Keep it on battery tender everyday when I get home. Replaced a battery after 9 months on previous battery. Only had a few min today but turned on ignition for about 2 min and reading was 12.7 volts. With multimeter on dropped around 10 volts as bike started. Ran up to 2000 rpms and it was at 14.3 volts. Been starting after night shift and it groans but starts (about 33 f). Should I worry? TIA
Road Captain
Joined: May 2015
Posts: 668
Likes: 72
From: Wisconsin
Sounds like a bad battery. The 14.3 shows it's charging. The 12.7 shows it's charged. The groaning shows you don't have the CCA's. If you have the tender connected you can stop at a battery's plus or most any auto store. They can hook to the tender connection. And can tell if the CCA's are what they should be. Most likely you have a dead cell. If the battrey is 9 months old you would be under warranty. Good luck
Seasoned HDF Member
Joined: Apr 2018
Posts: 5,940
Likes: 5,132
From: Louisiana
12.7 V = Full charged battery. What's the CCA of the battery?
On second thought that is resting voltage, 12.7 V. You mentioned having it on a battery tender. if you can, leave the battery tender unplugged for at least 12 hrs and check the voltage. That will be resting voltage. It should be at or very close to 12.7 V.
On second thought that is resting voltage, 12.7 V. You mentioned having it on a battery tender. if you can, leave the battery tender unplugged for at least 12 hrs and check the voltage. That will be resting voltage. It should be at or very close to 12.7 V.
Last edited by Down South; Jan 13, 2019 at 09:35 PM.
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Road Master
Joined: Jul 2010
Posts: 1,045
Likes: 102
From: Waukesha, WI
At 33 degrees 20w50 oil is like syrup, that's a big part of your problem. No harm in plugging in the maintainer daily, if the battery doesn't need any charging it'll just turn itself off. I'm in the same habit, when I'm not riding it gets plugged in.
