Service Manual

SECTION 6 - TROUBLESHOOTING

6-28 – JLG Lift – 3121228

Code 27 - P1-Auxiliary #2 - Disconnected

Check For These Obvious Conditions First:

• Is machine equipped with a component on the Auxiliary #2 circuit.

Code 28 - RESERVED

Code 29 - RESERVED

Table 6-28. Code 27 - P1-Auxiliary #2 - Disconnected

STEP ACTION SPEC YES NO

1. Is machine equipped with a component on the Auxiliary #2 circuit.

— Go to Step 3 Got to Step 2

2. At the Ground Control Module enter the programming mode, check if the

Auxiliary #2 open circuit detection is enabled.

Default = NO Disable It Replace Ground

Control Module

3. Check voltage at the P1 connector on the Ground Control Module between

pin-8 and pin-1. Is reading within specification?

2 - 4 V DC Replace Ground

Control Module

Go to Step 4

4. Remove the wire terminals at the Aux. #2 component, check continuity of

each of the wires from pins-8 and 1 on the P1 connector to the Aux. #2

component.

— Replace the

Component

Repair or

Replace Wiring