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MY 2012 Ford Ranger 3.2 4x4 diff lock is not disengaging, although the diff lock selection is off in the cabin. What can be wrong?

No fuses blown, no relays not operational,

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This was built after I retired, so I will give you a little background. There were electric actuators and vacuum actuators. Some used pressure to move the actuators both ways and others expected the actuator to retract on its own. Corrosion or dirt could bind the actuator plunger. On the electric type the connector plugs could corrode. The vacuum models could have a leak or simply be too weak to return a stuck plunger. Try checking the electric plug or vacuum test any vacuum fittings on the unit.

Posted on May 01, 2017

  • Johann
    Johann May 01, 2017

    Thanks. Much appreciated. Will check the actuator and switch and let you know what was wrong.


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I would check for voltage at the engagement solenoid. If there's voltage with the switch off, check the relay

Posted on May 01, 2017


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