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

WARNING: This page is about a different variant/trim than selected.

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.