Check Alternator Excite Circuit

Fault detected in the alternator excitation circuit; the battery may not be charging.

Possible causes

Worn alternator brushes
Defective voltage regulator
Loose or broken alternator belt
Excite circuit (2A wire) open

Recommended actions

Check alternator belt tension
Measure voltage with engine running (should be 13-14V)
Inspect alternator wiring
Replace alternator if not generating charge

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