P0625 – Generator Field Control Low

Description

The ECM detects a low voltage condition in the generator field control circuit.

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Symptoms

  • Battery light on
  • Low voltage
  • Dim lights

Causes

  • Short to ground
  • Faulty alternator
  • Wiring issues

Diagnosis

  • Monitor field voltage
  • Inspect wiring
  • Test alternator

Repair

  • Repair wiring
  • Replace alternator

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