2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 429Get this manual
ELECTRIC STARTER 7Starter Relay Switch Inspection Check the function of the starter relay switch (page 21-12)Is the starter relay switch function properly? NO YES Faulty starter relay switchLoose or poor contact of the starter relay switch connector terminal
Starter motor turns engine slowly Low battery voltage Poorly connected battery cable Poorly connected starter motor cable Faulty starter motor Poorly connected ground cable terminal Starter motor turns, but engine does not turn Faulty starter clutch Damaged starter gear train Starter relay switch clicks, but engine does not turn over Crankshaft does not turn due to engine problems