Jacobsen AR3, Technical/Repair Manual

Page: 102 / 342

ELECTRICAL
4181384 First Edition 4-45
4
Weight Transfer Circuit—Theory of
Operation
Power Circuit
Unswitched power is available to key switch terminal 30.
When the key switch is turned to the run position, current
flows from the AC terminal of the key switch through
10-amp fuse F10 to control module terminals 3 and 8,
powering up the module. With the control module
powered up, the control module now provides 5 volts to
the raise/lower switch.
Weight Transfer Circuit
When the raise/lower switch is momentarily placed in the
lower position control module 12V lower solenoid output
provides voltage to the weight transfer switch. (See
“Raise/Lower Circuit—Theory of Operation” on
page 4-36.)
When the weight transfer switch is in the on position,
current flows to the weight transfer solenoids, energizing
the solenoids.
When the weight transfer switch is in the off position,
current flows to the lower solenoid. (See “Raise/Lower
Circuit—Theory of Operation” on page 4-36.)