jkv45 (Enthusiast) View all posts in this topic  
Fri Sep 30, 2016 10:05 am
Battery        

Sounds like a bad battery.

Read the voltage as it sits. If it's below 12.7 it's not fully charged. After charging test it again - anything over 12.7 is good. Turn on the ignition and see how much it drops, then hit the starter and check again. If it's under 10V while cranking it's bad.

A battery can read fully charged, but still be bad. Only way to know is to test it under load (cranking).

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