Battery drops to 0 volts when ignition key turned to ON
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- Posts: 32
- Joined: Wed Mar 11, 2015 8:18 pm
Battery drops to 0 volts when ignition key turned to ON
Hey Guys, I've got a brand new Lithium battery on my 81 cb650 and when I turn the key to ON the battery voltage drops to 0 from 13.5. The battery has been working great and the bike starts everytime, I also replaced my charging system about 2 months ago, along with the battery. I know some will say it's the battery, but i had the battery tested and I put it into another bike(74 suzuki GT380) and it works perfectly. Could there be a short in the ignition system? I've dealt with plenty of bad batteries but i've never seen the voltage drop to 0 just by turning the key.. Any advice? As always, I thank you!
Re: Battery drops to 0 volts when ignition key turned to ON
Not sure what the problem can be but with a good multimeter you can find out if there is a short somewhere.
If it's a Lithium iron phosphate battery you use i recommend that you change back to the lead acid battery as the charging system is not made to work with anything else. That could do the trick but without knowing if there is any problem in the electrical system it's hard to tell.
If it's a Lithium iron phosphate battery you use i recommend that you change back to the lead acid battery as the charging system is not made to work with anything else. That could do the trick but without knowing if there is any problem in the electrical system it's hard to tell.
Riding bikes? I ride where ever i want and whenever i want.
Online manual: http://cosky0.tripod.com/
Online manual: http://cosky0.tripod.com/
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- Posts: 32
- Joined: Wed Mar 11, 2015 8:18 pm
Re: Battery drops to 0 volts when ignition key turned to ON
Thank you for the reply. I did try my old lead battery but got the same results, which makes me think it's a short. I'm confused why a lithium battery doesn't work with these charging systems, it's still a 12v battery but with advantages. I run lithium ion batteries in all my bikes and have never had a problem, most of the bikes are from the 70's-80s. I'm still leaning on a possible short somewhere in the wiring harness, i'm going to start checking my grounds. Thanks!
Re: Battery drops to 0 volts when ignition key turned to ON
Well that is a bit complicated but a Lithium iron phosphate battery need a more stable charging than an over 30 year old charging system can deliver, so much i know at least.
Myself i had problem with no charging and in the end it was the harness that was faulty.
What you can use if the ordiary lead acid battery turns a bit weak is a start help with Lithium iron phosphate batteries in it.
Something like this:
https://shop.antigravitybatteries.com/products/micro-starts/xp-1/
I have something similar and it works great if my bike have'nt ben run for a couple of weeks or so.
Especially after the winter hibernation.
Myself i had problem with no charging and in the end it was the harness that was faulty.
What you can use if the ordiary lead acid battery turns a bit weak is a start help with Lithium iron phosphate batteries in it.
Something like this:
https://shop.antigravitybatteries.com/products/micro-starts/xp-1/
I have something similar and it works great if my bike have'nt ben run for a couple of weeks or so.
Especially after the winter hibernation.
Riding bikes? I ride where ever i want and whenever i want.
Online manual: http://cosky0.tripod.com/
Online manual: http://cosky0.tripod.com/
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- Posts: 32
- Joined: Wed Mar 11, 2015 8:18 pm
Re: Battery drops to 0 volts when ignition key turned to ON
Thanks man. I've decided to replace the wiring harness, i've wanted to for a while now. Also, the battery was under warranty, and "bikemaster" was cool about sending a replacement for free, so I just went ahead and did that. I think it's a combination of a shorted wire and weak battery, we'll see how it does after a new harness. Cheers.
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