1989 Ski-Doo Repair Manual, Page 384Get this manual
Section 04
ELECTRICAL SYSTEM
Sub-section 04
(BATTERYl
If the present charger is not adjustable to the proper current values, rheostat can be connected in series with the battery to provide adjustment12 Ohm, 50 watt rheostats, such as OHMITE0314 or MALLORY 50K 12p, are available from electronic parts supply shops and they are suitable for use with most chargers if the peak current is to be held below ampsIf you need an accurate ammeter, we recommend the use of: SHURITE5202 (0 to amps) or5203 (0 to amps) available from electronic parts supply shops
TROUBLE SHOOTING:
Symptom
Discharged or weak battery
1Battery posts andor cable tennilal oxidized 2Loose or bad connections Clean
Check wiring and connectors: cleanfiness, damaged or short cirwit Replace
3Faulty battery (sulfated, doesn't keep full charge, damaged casing, loose post) 4Faulty rectifier