11921  Slauson Ave.    Santa  Fe  Springs,  CA.    90670    (800)  227-4116    FAX  (888)  771-7713
28
TERMINAL “B” 
BA
TTERY (+)
STARTER
SOLENOID
VALVE “C”
LOWERING 
SOLENOID VALVE
TERMINAL “D”
COIL DRIVE
TERMINAL “C”
GROUND (-)
POWER UNIT
FIG. 28-1
TERMINAL “A”
LOAD
1. Check if the “A” (lowering)
solenoid valve is constantly 
energized. Connect voltmeter 
negative (-) lead to ground (-) 
wires connection on pump and 
positive (+) lead to (+) terminal 
on the 
“A” (lowering) solenoid 
valve (FIG. 28-1). If voltmeter 
reads battery voltage, check 
for faulty wiring or toggle 
switch.
TROUBLESHOOTING
PLATFORM RAISES BUT LEAKS DOWN