JLG DVSP Series Service Manual - Manual (Page 131)

SECTION 6 - TROUBLESHOOTING
3121136 – JLG Lift – 6-17
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.
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.
Table 6-17. Code 14 - Pump Motor - Disconnected
STEP ACTION SPEC YES NO
1. Check resistance across the positive (+) and negative (–) studs on
the pump motor.
SeeTable 6-2
Replace Ground
Control Module
Repair or Replace
Pump Motor or
Motor Brushes
Table 6-18. Code 15 - Lift Down Valve - Disconnected
STEP ACTION SPEC YES NO
1. Check voltage at the P1 connector on the Ground Control Module
between pin-10 and pin-3. Is reading within spec?
2 - 4 V DC
Replace Ground
Control Module
Go to Step 2
2. Check resistance between the terminals on the lift down valve,
located at the base of the lift cylinder. Is reading within spec?
24.5 Ohms
Repair or Replace
Wiring Harness
from Ground
Control Module
Replace the
Lift Down Valve
Solenoid
3. With the terminals still removed from the lift down valve coil, check
continuity of the wires from pins 10 and 3 on the P1 connector to the
lift down valve.
.00 Ohms —
Repair or Replace
Wiring