battery voltage drops with nothing on - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 3 (permalink) Old 05-16-2010, 06:04 PM Thread Starter
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battery voltage drops with nothing on

I went for a ride and she was running great went about 5 miles, into a store for 10 min or so came out and she would not start. I had to bumb start drove home but RPM's were all over the place. come to stop it would be high I gave throttle no change. adjusted the RPM's down then she almost died. got home let her cool down checked voltage 10 or so, so I charged battery then checked voltage levels and I could see the voltage drop .01 volts per second or so. I got a full charge got her started and measured voltage at idle 13.8ish rev the throttle voltage goes up to 14v range. I was feeling like to R/R is the issue it has been relocated. the harness was melted and looked like it had been shorting out so I cut the harness wire for wire and soldered them together (last fall). now when bike runs for about 10 min. the wires get hot. then she will not start after I turn off. Does any one have any ideas? Any help would be great. 1986 VN750 by the way. Thank you all

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post #2 of 3 (permalink) Old 05-16-2010, 06:27 PM
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Check electical connections. Especially to the r/r and battery cables. Also check the battery.

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post #3 of 3 (permalink) Old 05-16-2010, 08:41 PM
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I would also go over the wiring harness and make sure nothing has rubbed the insulation off and shorted or grounded and what nite said about the connectors make sure they are clean and not corroded and bleeding over from pin to pin .After you clean a connection use dieelectric grease on it when you plug it back together. sounds like a short somewhere, and it is not a very big one to drop no faster than may be hard to spot ,so I would make sure all my wiring harness connectors are cleaned and greased.And if that is the same battery and you just charged it, take it out of the bike and see if it drops voltage like before.It might be the whole problem ,it may be shorted.

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