1-14. ELECTRICAL SYSTEM (CONT)
Figure 1-23. M1089 Underlift System.
j. M1089 Underlift. The electrical portion of the M1089 Underlift consists of a REMOTE CONTROL UNIT (1, Figure
1-23) and solenoids attached to the function valves in the WRECKER CONTROL PANEL (2). When the operator
selects an underlift function from the REMOTE CONTROL UNIT, electrical current is sent to the solenoid which controls
the selected function. The solenoid is energized and hydraulic pressure is supplied to the selected component(s). When
the solenoid is de-energized, hydraulic pressure is removed and the selected function stops.