I have a problem my 88 EZGO 2 Stroke golf cart not charging the battery. It starts fine but I need to charge the battery after a week or so depending on usage. When driving it the most voltage I see at the battery is less than 12.5 volts. I know this won't keep an automotive battery charged. I haven't found any higher voltage on the regulator terminals. Where should I test with my VOM to determine what isn't working? (diagrams or photos would be helpful) Thanks, Krazee.