7-432 Power Outlets
Description and Operation
Power Outlets Description and
Operation
12 Volt Power Outlet Receptacle
Description and Operation
The vehicle is fitted with a 12 V accessory power
receptacle. The accessory power receptacles are
controlled by an ignition operated relay. The accessory
power receptacles are operational when the ignition is
turned to either the On or the Accessories positions.
The X80J and X80K accessory power receptacles may
be configured to be operational when the ignition is Off
by changing the position of the 50A fuse from the
F10DL position to the F11DL position in the left
instrument panel fuse block.
110 Volt Power Outlet Receptacle
System Description
Power Outlets Block Diagram
3403851
The alternating current (AC) accessory power outlet
system consists of the accessory DC/AC power inverter
module and the accessory power receptacle – 110 V
AC. The accessory DC/AC power inverter module
converts 12 V direct current (DC) battery power to
110 V at 60 Hertz (Hz) AC power to operate AC
powered devices. The accessory DC/AC power inverter
module provides up to 150 watts of power. The
accessory power receptacle – 110 V AC provides the
usual connection for AC powered devices.
110 Volt Power Outlet Receptacle
System Operation
The accessory DC/AC power inverter module receives
fuse protected battery voltage and is connected to the
12 V electrical system ground. The accessory power
receptacle – 110 V AC has an internal switch, that
detects when an AC powered device is plugged into the
outlet. When the ignition is ON, and an AC powered
device is plugged into the accesso ry power receptacle
– 110 V AC, the normally open switch in the accessory
power receptacle – 110 V AC, closes. When the
accessory DC/AC power inverter module detects the
voltage from the accessory power receptacle – 110 V
AC switch, the inverter module begins to supply 110 V
AC to the accessory power receptacle – 110 V AC after
a 1.5 s delay. The accessory AC power system is
protected against circuit overload and circuit shorts to
ground.
110 Volt Power Outlet Receptacle
Isolation Fault Protection
The accessory DC/AC power inverter module contains
a ground fault circuit interrupter (GFCI). GFCI monitors
the 110 V circuit for a short to vehicle chassis ground.
If a 110 V AC short to ground is detected, the accessory
DC/AC power inverter module will turn OFF. The
module remains OFF, until the AC powered device is
unplugged from the outlet, and then plugged into the
outlet after a 3 s delay.
2021 - Silverado 4500HD, 5500HD, and 6500HD Electrical Body Builder Manual
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