Diagnose Electrical System

Symptom Problem Solution

Complete Electrical System Failure

Battery Disconnect Switch OFF

Turn Battery Disconnect Switch ON.

Loose or corroded battery connectors

Clean, tighten or replace battery connectors.

Batteries discharged

Charge or replace batteries.

Batteries removed

Replace batteries.

Batteries Not Charging

Loose or corroded battery connectors

Clean, tighten or replace battery connectors.

Sulphated/old batteries

Replace batteries.

Belt damaged

Replace belt.

Belt tensioner not working

Repair or replace tensioner.

Improper alternator output

Repair or replace alternator.

Starter Motor Spins But Won't Engage

Starter motor failure

Replace starter. Contact authorized dealer for service.

Starter Motor Inoperative

Complete electrical system failure

See Diagnose Electrical System - Complete Electrical System Failure

Ignition switch failure

Check connectors. Replace switch.

Starter solenoid failure

Check connectors. Replace solenoid.

Batteries discharged

See Diagnose Electrical System - Batteries Not Charging

Inoperative Air Conditioning (Accessories also Not Operating)

Complete electrical system failure

See Diagnose Electrical System - Complete Electrical System Failure

Inoperative Air Conditioning (Accessories Operating)

Fuse open

Replace fuse.

Cab Air Circulation Fan Inoperative

Fuse open

Replace fuse.

Heater Fan Inoperative

Fuse open

Replace fuse.

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Symptom Problem Solution

Wipers Inoperative

Fuse open

Replace fuse.

Horn Inoperative

Fuse open

Replace fuse.

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