Electrical System - Troubleshooting - JLG 80HX Service Maintenance Manual

SECTION 3 - TROUBLESHOOTING
.
TROUBLE
No power to platform controls.
Starter will not crank.
Engine continues to crank.
3-18
Table 3-6.Electrical System - Troubleshooting
PROBABLE CAUSE
PLATFORM CONTROLS.
15 Amp self-reset circuit breaker open.
Contact block in footswitch malfunctioning.
Faulty power circuit wiring.
Select switch in wrong position.
ENGINE STARTER SYSTEM.
Discharged battery or loose battery terminals.
Starter relay faulty or faulty relay connections.
Malfunctioning starter solenoid or motor.
Malfunctioning ignition switch.
Faulty ignition and/or starter circuit wiring.
Faulty start lockout system.
Faulty start switch.
Faulty ignition and/or starter circuit wiring.
Malfunctioning starter solenoid or motor.
Faulty start switch.
– JLG Lift –
REMEDY
Check footswitch to ensure that both switches
are making contact when pedal is depressed.
Repair or replace footswitch as necessary.
Repair, replace or adjust contact block as
required.
Check wiring continuity. Refer to proper wiring
diagram.
Place select switch to correct position.
Check and charge battery or replace battery as
necessary. Clean and secure battery terminals.
Using a test meter, check relay coil terminals for
presence of electrical power and for energization
of relay coil. Also check relay terminals for cor-
rect switching of contacts. Replace relay as nec-
essary.
Replace solenoid or motor in accordance with
applicable manufacturer's manual.
Using a test meter, check ignition switch for cor-
rect switching of contacts. Replace switch as
necessary.
Check wiring continuity. See proper wiring dia-
gram.
See correct wiring diagram.
Replace switch.
Check wiring continuity. See proper wiring dia-
gram.
Replace solenoid or motor in accordance with
applicable manufacturer's manual.
Replace switch.
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