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DC ELECTRICAL SYSTEM
DIAGNOSTIC CHART
Problem Possible Cause
No 12 Volt Power At Battery Battery switch turned off
Weak or dead battery
Battery cables loose/disconnected
Battery Not Charging While Engine Is
Running
Faulty alternator
Faulty circuit wiring
Faulty battery charger/battery
Battery Will Not Hold Charge Faulty/ old battery
Loose battery cables
Corroded battery terminals
12 Volt Equipment Not Working Fuse blown-Take time to investigate why the
equipment was drawing too much current or
why it had a short circuit. Check fuses at fuse
block and under the engine shroud
Weak or dead battery if all 12 volt equipment
fails to function.
Corroded/loose wire connection
Internal equipment short/failure
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