Service manual

(118)
Next, diagnose the switch by following the
switch diagnosis section of the A.E.S. manual
which we have previously discussed. As a final
check in our diagnosis of the 120 volt circuit,
visually inspect the refrigerator power cord. If
necessary check the cord end to end for
continuity on the ground black and white
wires that make up the power cord. If no
continuity is indicated on one or more of the
power cord wires replace the power cord.
During this diagnostic step be sure that the
power cord leads are firmly connected to the
AC terminal block.
(119)
NO 12 VOLT DC OPERATION.
As we
mentioned earlier in the program, the ignition
lock terminal houses the wire connection that
controls the 12 volt heating element circuit and
the 25 minute delay cycle.
The wire from this terminal should be routed
directly to the run side of the vehicle’s ignition
switch. This will provide DC voltage to the
ignition lock terminal only when the vehicle is
in motion. It also allows the vehicle’s alternator
to keep the house battery charged and
eliminates a possible dead battery due to the
customer
forgetting to switch off the
refrigerator. Whenever the ignition key is
turned off, the electronic control system will
initiate a 25 minute delay cycle. When the
vehicle’s ignition is turned back on the system
will re-energize the 12 volt DC circuit. The
ignition lock wire,
which is commonly
referred to as the “tag line”, should be a wire
size of at least 16 gauge. The amperage
demands from the element are handled by the
positive and negative leads of the terminal
block, which necessitates the need for larger
wire gauge requirements.
NO 12 V.D.C. OPERATION
A-6-40