2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 368Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 368

ELECTRICAL Electrical Service Notes Keep the following notes in mind when diagnosing an electrical problem: Refer to wiring
obtained with other meters may differ Pay attention to the prefix on the multimeter reading (K, M, etc and the position of
the decimal point For resistance readings, isolate the component to be testedDisconnect it from the wiring harness or power
supply Troubleshooting No Spark, Weak or Intermittent Spark Spark plug gap incorrect Fouled spark plug Faulty spark plug
cap or poor connection to high tension lead Related wiring loose, disconnected, shorted or corroded Engine stop switch or
ignition switch faulty ETC switch mis-adjusted or faulty Wire harness or connections wet, corroded or broken Poor ignition
coil ground Incorrect wiring after repair (inspect color coding in connectors, etc Faulty ignition coil windings (measure
resistance of primary and secondary) Sheared flywheel key Flywheel Loose or damaged Excessive crankshaft runoutshould not