2008 Arctic Cat 366 ATV Service Manual, Page 100Get this manual
Problem: Magneto overcharges Condition Remedy 1Internal battery short circuited 1Replace battery 2Regulatorrectifier resistor damageddefective 2Replace resistor 3Regulatorrectifier poorly grounded 3Cleantighten ground connection Problem: Charging unstable Condition Remedy 1Lead wire intermittently shorting 1Replace lead wire 2Magneto internally shorted 2Replace magneto 3Regulatorrectifier defective 3Replace regulatorrectifier Problem: Starter button not effective Condition Remedy 1Battery charge low 1Chargereplace battery 2Switch contacts defective 2Replace switch 3Starter motor brushes not seating 3Replace starter motor 4Starter relay defective 4Replace relay 5Emergency stopignition switch off 5Turn on switches 6Wiring connections loosedisconnected 6Connecttightenrepair connections Problem: Battery "sulfation" (Acidic white powdery substance or spots on surfaces of cell plates) Condition Remedy 1Charging rate too lowtoo high 1Replace battery 2Battery electrolyte insufficient 2Keep electrolyte to prescribed level 3Specific gravity too low 3Charge batteryadd distilled water 4Battery run-downdamaged 4Replace battery 5Electrolyte contaminated 5Replace battery Problem: Battery discharges too rapidly Condition Remedy 1Electrolyte contaminated 1Replace battery 2Specific gravity too low 2Charge batteryadd distilled water 3Charging system not charging 3Check magnetoregulatorrectifiercircuit connections 4Cell plates overchargeddamaged 4Replace batterycorrect charging system 5Battery short-circuited 5Replace battery 6Specific gravity too low 6Charge battery Problem: Battery polarity reversed Condition Remedy 1Battery incorrectly connected 1Reverse connectionsreplace batteryrepair damage