Section 01-14A: Handles, Locks, Latches and Mechanisms
1996 F-150, F-250, F-350, F-Super Duty and Bronco Workshop Manual
DIAGNOSIS AND TESTING

Symptom Chart — Power Door Lock Diagnosis

NOTE: Use Rotunda 73 Digital Multimeter 105-R0051 or equivalent to perform electrical pinpoint tests.

POWER DOOR LOCK DIAGNOSIS
ConditionPossible SourceAction
  • One Door Lock Inoperative
  • Circuitry.
  • Power door lock actuator.
  • All Door Locks Inoperative
  • Locks circuit breaker open.
  • Battery/power circuit.
  • Poor ground.
  • Circuitry.
  • Door lock switch.
  • All Locks Operate from One Switch Only
  • Power to switch.
  • Door lock switch.
  • Circuitry.
  • Door Locks Operate One Way Only
  • Circuitry.
  • Poor ground.
  • Left door lock switch.
  • Door Locks Work with Engine Running Only
  • Battery discharged.
  • Door Locks Work Intermittently
  • Battery partially charged.
  • Connections loose, opening or shorting.
  • Intermittent door lock switch or power door lock actuator.