Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. 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:

Variable speed electric cooling fan.
Harness circuits: FCV, B+, VPWR, ground.
Powertrain Control Module (PCM).

Fig 1: Identifying Variable Speed Fan Circuits & Connector Terminals (Crown Victoria, Grand Marquis & Town Car)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Cooling Fan Motor Harness Connector Terminals (LS & Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Cooling Fan Controller Circuits & Connector Terminals (LS & Thunderbird)

Courtesy of FORD MOTOR CO.