Code 23 - Horn - Disconnected; Code 24 - Auxiliary #1 Circuit - Short Circuit - JLG 15MVL Series Service Maintenance Manual

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SECTION 6 - TROUBLESHOOTING

Code 23 - Horn - Disconnected

Check For These Obvious Conditions First:
• Is machine equipped with a horn unit.
STEP
1.
Is machine equipped with a horn unit.
2.
At the Ground Control Module enter the programming mode, check if the
horn open circuit detection is enabled.
3.
Check voltage at the P1 connector on the Ground Control Module between
pin-14 and pin-7. Is reading within specification?
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.

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.
STEP
1.
At the Ground Control Module, P1 connector, check the voltage across
pins-9 and 2 to the horn. Is reading within specification?
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.
6-28
Table 6-27. Code 23 - Horn - Disconnected
ACTION
Table 6-28. Code 24 - Auxiliary #1 Circuit - Short Circuit
ACTION
– JLG Lift –
SPEC
YES
Go to Step 3
Disable It
2 - 4 V DC
Replace Ground
Control Module
Replace the
Horn
SPEC
YES
0 - 2V DC
Go to Step 2
Replace the
Component
NO
Got to Step 2
Replace Ground
Control Module
Go to Step 4
Repair or
Replace Wiring
NO
Replace Ground
Control Module
Repair or
Replace Wiring
3121231

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