Pinpoint Test TG: 4x4 Low Switch (4X4LSW) And Four Wheel Drive (4WD) Switch: Introduction: Notes

This pinpoint test is intended to diagnose the following:

• Harness circuits between the PCM and the 4WD control module.
• Harness circuit for mechanical 4x4L.
• Powertrain control module (PCM) (12A650).
  Fig 1: 4x4 Low Switch (4X4LSW) Connector

  Courtesy of FORD MOTOR CO.

Fig 2: Four-Wheel Drive (4WD) Module Connector

Courtesy of FORD MOTOR CO.