You cannot diagnose any electrical problem until you have a solid source of 12 volts.
You can go to this video for a VERY SImple explanation.
youtube.com/watch?v=rJYJ3KvPhhY  

You have to proceed this video URL with the... http://www.


Last Edited By: Lucky 2 05/16/13 8:17 PM. Edited 1 times.