Voltage and polarity
The vehicle electrical system is a 12-volt
direct current (DC) negative-ground
system. A voltage regulator controls
system voltage at approximately 12-volts.
All circuits are grounded by direct or
indirect connection to the negative (-)
terminal of the battery. A number of
ground connections throughout the car
connect the wiring harness to chassis
ground. These circuits are completed by
the battery cable or ground strap
between the body and the battery
negative (-) terminal.
Wiring, fuses and relays
Electrical components connect using
one of the following:
Heavy cables with lug-type
connectors (battery and starter)
Electrical harnesses with keyed,
push-on connectors that lock into
place
Busses with modular connectors
With the exception of the starter and the
charging system, most electrical power
is routed from the ignition switch or the
battery through the main relay panel in
back of the glove compartment or the