electrical troubles...battery? - DFWstangs Forums
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 11-15-2010, 03:04 PM Thread Starter
Time Served
Join Date: Jan 2009
Location: The Land of Gar
Posts: 502
Smile electrical troubles...battery?

Background: Battery was getting weak back in the spring, bought a new one from O'Reilly's, put it in, everything lovely. Rode the bike I don't know, couple weeks, then one day it just died going down the road. About that time it got hotter than hell and I was working 80 hours a week so I just parked it. I guessed stator and ordered one. This is a Ninja 500 btw, if that matters.

Well I just got around to messing with it, and here's what I found.

Put the battery on a charger, charger says the battery is good. Amperage out of the charger is about zero. Voltage checked across battery terminals is 9.78, which sounds high, but I don't know much about motorcycle batteries.

If I turn the key on, voltage goes to zero. No lights come on. Do the same thing with the battery charger hooked up and everything works.

With the battery removed, voltage across the terminals is the same 9.78V. Resistance across leads with key off is infinite, with key on is about 6 ohms. Resistance across battery terminals is infinite.

I thought maybe a short in the system, but the 6-ohm resistance I measured ruled that out I think. It doesn't seem like I should measure that much voltage on the battery if it's junk, but maybe I'm wrong. I thought the resistance across the terminals should be something less than infinite too, but my truck battery did the same thing.

Did I just buy a shit battery or is there something else going on? Any more tests I should perform? TIA

Last edited by stephen4785; 11-16-2010 at 11:16 PM.
vtstang66 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 11-15-2010, 03:14 PM
That's my Ass
BigBlue's Avatar
Join Date: Aug 2004
Location: Midlothian
Posts: 1,644
You' re posting in the wrong forum. Do yourself a favor and look around
BigBlue is offline  
post #3 of 4 (permalink) Old 11-15-2010, 03:46 PM Thread Starter
Time Served
Join Date: Jan 2009
Location: The Land of Gar
Posts: 502
Well apparently for starters it's supposed to be a 12V battery, not 6V, I feel like a bit of a dumbass...
vtstang66 is offline  
post #4 of 4 (permalink) Old 11-15-2010, 07:05 PM
Join Date: Jun 2005
Posts: 3,391
Sounds like your battery is toast. It should be 12 volts. If you measured 9 volts and nothing happens when you turn the key on...Id say that means at least one of the cells in the battery is shorted out. You need a new battery. On a side note...batteries dont charge themselves. You have to start the bike up and let it run occasionally or keep it on a trickle charger or the battery will not last very long.

FUCK Canada
ram57ta is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the DFWstangs Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome