Join Date: Jan 2014
Location: South Central PA
Read the codes, write them down, then clear them. Check the date on the battery and see how old it is. Old AGM's can cause voltage issues, even though the scooter starts fine.
After that put a VOM on the battery and see what the voltage is with the engine off, at idle, and at 2500 rpm. If its less than 12.2 off, you'll need to charge it up first. At idle it should be more than about 13. At 2500 it should be 14 to 14.6 volts
Tighten the battery cables while you are at the battery. If you find a loose one, that might be all it needs.
If the voltages are good, and the charge lamp goes out, and the codes are just under or over voltages ride it and see if the codes return.
If you find burnt out parts in the charging system, or that battery is more than two years old (or a brand with a suspect pedigree) you should run a sulfate test on it. Pull it down to 12 volts with the load tester, then charge it at 30 amps. If the voltage runs up past 17.5 while on the battery charger, its sulfated, and should be replaced.
If its not charging, you'll need to run through the no charge trouble ladder in the manual. Basically test the stator output (AC volts) and a couple of circuits from the regulator. Check the pins on the stator pig tail for burning.
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