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JAYCO CAMPING TRAILERS SECTION 6 – ELECTRICAL SYSTEM
6-3
C
ONVERTER
The power converter converts 120-volt AC power to useable 12-volt DC power
when the shore power cord is connected to an external power source. The power
converter is built into the Load Center.
The converter has a built-in protective thermal breaker that will shut it down should
overheating occur. Overheating can be caused by operating the converter above
its maximum power output for an extended period of time, or by an obstruction to
its ventilation air flow. To reduce converter heat build keep unnecessary 12-volt
lights and motors turned “off”
. Keep the converter cooling fins and fan clear of
obstructions.
Inspection and maintenance
If the 12-volt power converter is not working (auxiliary battery not being charged)
check the reverse polarity fuse(s). These fuses are located with the other 12V
fuses in the Load Center (
Fig 6.2 ). There are no customer serviceable parts
inside the converter case and the manufacturer’s warranty will be void if the
case has been removed . If you have further concerns contact your dealer.
GFCI R
ECEPTACLE
O
UTLET
Grounding is your personal protection from electrical shock. Each RV has a
ground fault current interrupter (GFCI) engineered into the electrical system. This
device has been designed to reduce the possible injury caused by electric shock.
The GFCI will not protect against short circuits or circuit overloads.
Test all GFCI receptacles monthly

Push in the GFCI “TEST” button (located on the GFCI receptacle). The GFCI
“RESET” button should pop out indicating the GFCI receptacle has been
“tripped” and interrupted 120-volt power.

Push in the GFCI “RESET” button (located on the GFCI receptacle) to restore
120-volt power. Contact your independent dealer for assistance if the GFCI
“RESET” button does not restore 120-volt power and pops back out.
A “tripped” GFCI receptacle indicates that abnormally high 120-volt current flow (a
ground fault) was detected through the electrical system grounding circuit. A fault
condition can be caused by faulty wire insulation, wet wiring inside an appliance,
or faulty electrical equipment connected to the circuit, etc. All ground faults must
be repaired before use of the RV.
12-
VOLT
DC S
YSTEM
The majority of your RV lighting is powered by 12-volt electricity. The 12-volt DC
system is composed of components that will operate when the following conditions
are met:
□ Power is supplied by the tow vehicle alternator when the engine is running
and the 7-way trailer plug is connected. This powers the RV’s running lights,
brake lights, turn signals and brakes. In addition, the 7-way trailer plug
provides a common ground and a 12-volt charge line to charge the auxiliary
battery.
□ The converter will supply interior 12-volt DC power when the power cord is
plugged into campground power. The converter will also charge the RV
battery in most situations.
□ The auxiliary battery powers many interior 12-volt components including the
lighting fixtures, water pump, 12-volt motors, 12-volt appliances, etc. It also
powers the breakaway switch.