JLG 10MSP Service And Maintenance Manual page 52

SECTION 6 - TROUBLESHOOTING
Code 14 - Pump Motor - Disconnected
Check For These Obvious Conditions First:
• Check the Positive (+)/Negative (–) cables from the Ground Control Module to the Pump Motor studs for loose or cor-
roded connections.
STEP
1. Check resistance across the positive (+) and negative (–) studs on th e
pump motor.
Code 15 - Lift Down Valve - Disconnected
Check For These Obvious Conditions First:
• Inspect wire terminals on the lift down valve at the base of the lift cylinder for tight and secure connection.
STEP
Check voltage at the P1 connector on the Ground Control Module between
1.
pin-10 and pin-3. Is reading within spec?
2. Check resistance between the terminals on the lift down valve, located at
the base of the lift cylinder. Is reading within spec?
3. With the terminals still removed from the lift down valve coil, check continu-
ity of the wires from pins 10 and 3 on the P1 connector to the lif t down valve.
6-22
Table 6-15. Code 14 - Pump Motor - Disconnected
ACTION
Table 6-16. Code 15 - Lift Down Valve - Disconnected
ACTION
– JLG Lift –
SPEC YES
SeeTable 6-2 Replace Ground
Control Module
SPEC YES
2 - 4 V DC Replace Ground
Control Module
6 Ohms Repair or Replace
Wiring Harness
from Ground Con-
trol Module
.00 Ohms —
NO
Repair or Replace
Pump Motor or
Motor Brushes
NO
Go to Step 2
Replace the
Lift Down Valve
Solenoid
Repair or Replace
Wiring
3121228