JLG DVSP Series Service Manual - Manual (Page 135)

SECTION 6 - TROUBLESHOOTING
3121136 – JLG Lift – 6-21
Code 23 - Horn - Disconnected
Check For These Obvious Conditions First:
• Is machine equipped with a horn unit.
Code 24 - Auxiliary #1 Circuit - Short Circuit
Check For These Obvious Conditions First:
• Damaged wiring in the Auxiliary #1 Component wiring harness or a damaged Component.
Table 6-26. Code 23 - Horn - Disconnected
STEP ACTION SPEC YES NO
1. Is machine equipped with a horn unit.
— Go to Step 3 Got to Step 2
2. At the Ground Control Module enter the programming mode, check
if the horn open circuit detection is enabled.
— Disable It
Replace Ground
Control Module
3. Check voltage at the P1 connector on the Ground Control Module
between pin-14 and pin-7. Is reading within specification?
2 - 4 V DC
Replace Ground
Control Module
Go to Step 4
4. Remove the wire terminals at the horn, check continuity of each of
the wires from pins-14 and 7 on the P1 connector to the horn end.
—
Replace the
Horn
Repair or
Replace Wiring
Table 6-27. Code 24 - Auxiliary #1 Circuit - Short Circuit
STEP ACTION SPEC YES NO
1. At the Ground Control Module, P1 connector, check the voltage
across pins-9 and 2 to the horn. Is reading within specification?
0 - 2V DC Go to Step 2
Replace Ground
Control Module
2. Remove the wire terminals at the horn, check continuity of each of
the wires from pins-9 and 2 on the P1 connector to the component
end.
—
Replace the
Component Repair or
Replace Wiring