Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Lincoln Town Car, 2002 Lincoln Navigator, 2002 Lincoln LS, 2002 Lincoln Continental, and 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following:

Electronic shift control module and mechanical 4WD LOW wiring harness circuit (4WD LOW). See Fig 1 and Fig 2 .
Powertrain Control Module (PCM).

NOTE: Electronic shift control module is also referred to as Generic Electronic Module (GEM).

Fig 1: Identifying Electronic Shift Control Module Circuit (Electronic Shift)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying 4WD LOW Circuit & 4x4L Switch Connector Terminals (Mechanical Shift)

Courtesy of FORD MOTOR CO.

4-WHEEL DRIVE SHIFT CONTROL MODULE

Application	Location
Explorer & Mountaineer	Under Passenger's Side Of Dash, Near Center Console
Expedition & Navigator	Under Driver's Side Dash, Near Left Kick Panel
F150 Pickup	Under Driver's Side Of Dash, Near Steering Column
Ranger	Behind Right Kick Panel