5 - 3 ELECTRICAL
GEM Service Manual November 2007
POWER SYSTEM
DESCRIPTION
Fig. 2 Power System
The purpose of the power system is to provide
primary power for the drive and accessory systems.
The power system consists of the batteries, battery
charger, fuse, key switch, temperature sensor, and
power harness (not shown in the block diagram).
Six 12-volt or nine 8-volt (e6S, eLXD OPTION)
series-wired lead-acid batteries and provide a total
power supply voltage of 72 volts.
OPERATION
The battery charger automatically recharges the
battery to 100% charge when plugged into a
standard 110-volt, 15-amp-breaker outlet. When
the charger is active, logic in the motor controller
prevents the vehicle from being operated. The
battery charger monitors battery temperature by
means of a temperature sensor. If the battery
temperature reaches above 120°F (49°C), the
charger will shut down.
DIAGNOSIS AND TESTING
Diagnosis and testing of the power system is
integrated with the diagnosis and testing of the
drive system.
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