Battery Issue (voltage draw)
Cruiser
Joined: Oct 2009
Posts: 195
Likes: 4
From: Washington
Yes but it is better to test off the neg side not the poss side,And it is better if amp meter can read milli amps because a 340ma draw can drain a auto battery down in around 10 days sitting and bike battery's would even be faster.
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Cruiser
Joined: Mar 2008
Posts: 144
Likes: 0
From: Cypress,TX
Thanks everyone for the info, will check it tomorrow when I get the bike back.
Road Master
Joined: Feb 2008
Posts: 887
Likes: 133
From: Upstate NY
Its not the voltage its the amperage. The clock and ECM are drawing power even when the bike is off. This is minimal current. You should check with an amp meter inline between the positive battery cable and the positive post on the battery. The meter needs to be in series with the circuit. You should read probably less than an amp. If you are seeing a big draw, something is wrong and may be why your battery failed in addition to age.
Also, Advanced auto sells batterys for harleys that are from east penn for about $60. East penn makes the Harley OEM battery, its a different case with bars and shields. Not worth an extra $50. Same battery.
Batteries should be on tenders when the bike is not driven for a few days. The plates will sulfate with no charge and it will cause early life failure.
Also, Advanced auto sells batterys for harleys that are from east penn for about $60. East penn makes the Harley OEM battery, its a different case with bars and shields. Not worth an extra $50. Same battery.
Batteries should be on tenders when the bike is not driven for a few days. The plates will sulfate with no charge and it will cause early life failure.
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