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12-VOLT DC
Note terminals 1 through 4 are NOT designated in each coach at present point and may
vary between coaches. Terminals 5 and 6 are pre-designated in all coaches. Terminals 7
through 9 are true DC lines, such as #7 is assigned to TV antenna use. Terminals #8 and
#9 are open.
CAUTION: Your recreational vehicle has many 12-volt DC loads. When com-
bined, their total is more power consumption than the power convertor can produce.
Periodic overloads can be handled with an auxiliary battery for limited periods of
time. Prolonged overload on a convertor will shorten the life of its components. It is
recommended to plan and conserve the usage of your 12-volt DC system in a
priority method.
12-Volt DC (Direct Current) System
Included in your load center is a convertor which transforms 120-volt AC energy into
12-volt DC energy to supply your motorhome. When 120-volt AC power is supplied to
the power center through the main circuit breaker in "ON" position, the convertor will
produce 12-volt DC power to motorhome. An automatic relay is built into power center
and it switches between battery and convertor power.
Electric components are sensitive to heat and a convertor will produce heat. Ventilation is
required for proper operation. Also, a fan is built into the convertor to assist air
movement and temperature control. If normal ventilation is obstructed and the fan is not
able to control the temperature, a protective "Thermal Breaker" will trip the 120-volt AC
power to power convertor. After the compartment cools down, the breaker will reset
automatically and 12-volt power will be restored through the convertor.
Replaceable fuses are used to protect the 12-volt components. Blowing fuses continu-
ously indicates the overloading of a circuit or a "shorted circuit." Should fuses continue
to blow, contact your RV dealer for assistance.
A separate 12-volt fuse panel supplies power to your chassis. See chassis manual for
assistance.
Your power center also contains an automatic solid state battery charger that charges the
auxiliary battery in your motorhome with battery switch in "ON" position. The charger
senses the battery condition, produces energy until the battery reaches the correct voltage,
and then decreases charge rate or shuts down.
The auxiliary battery will also receive a charge from alternator when traveling.
Batteries, Chassis and Auxiliary
Each motorhome chassis is built with a battery to provide energy to start the engine and
supply energy for other components in the chassis. This battery is located under the hood.
Ford Motor Co. uses a "Motorcraft" battery, serviced and warranted by Ford.
An auxiliary battery is included in each motorhome for storage power when 120-volt
energy is not available. When drawing energy from storage battery, remember there is
limited power available until the battery needs to be recharged. This auxiliary battery is
located in the coach or house portion of your motorhome.
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