Originally Posted by
Moldman
didn't find fuse but battery had a May 2010 date on it. I am new owner of the Max IV. Purchased new battery but haven't installed yet. Would the old battery cause the amp gage not to show discharging or charging?
Probably not, but a 2010 battery is likely toast. put it in and see if the gauge works. if not check battery voltage before, while, and after starting the engine. it should drop while cranking, then increase for a few minutes after starting the engine eventually leveling off around 14 volts. An amp gauge measures the charge current going through it. when they go bad sometimes they break the connection so you don't get charge going to the battery, sometimes they melt down in such a way that they basically become a wire and continue to conduct without the gauge working. if you aren't showing a charge after you replace the battery, you can take one wire off the amp gauge and put it on the other post (just connecting the 2 wires directly together) and repeat the cranking test.
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