Diagnostic Aids

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

• Wiring Harness Circuits (ACCS, ACPSW, VPWR & WAC). See Fig 1-Fig 10
• Faulty Wide Open Throttle A/C Cut-Off (WAC) Relay
• Faulty Powertrain Control Module (PCM)

Fig 1: Identifying WAC Circuits & Connector Terminals (Blackwood, Crown Victoria, Econoline 4.2L, Excursion, Expedition, F250-F550 Pickup, Grand Marquis & Navigator)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying WAC Circuits & Connector Terminals (Continental)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying WAC Circuits & Connector Terminals (Cougar, Escape, Explorer, Explorer Sport, Explorer Sport Trac, Focus, Mountaineer, Ranger, Sable, Taurus, Town Car & Windstar)

Courtesy of FORD MOTOR CO.

Fig 4: Identifying WAC Circuits & Connector Terminal (LS & Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 5: Identifying ACCS Circuits & Connector Terminals (Blackwood, Econoline 4.2L, Excursion, Expedition, F150 Without Visctronic Cooling Fan & Navigator)

Courtesy of FORD MOTOR CO.

Fig 6: Identifying ACPSW & ACCS Circuits & Connector Terminals (Cougar, Crown Victoria, Escape, Focus, F150 With Visctronic Cooling Fan, Grand Marquis, Sable, Taurus & Town Car)

Courtesy of FORD MOTOR CO.

Fig 7: Identifying ACCS Circuits & Connector Terminals (Econoline Except 4.2L)

Courtesy of FORD MOTOR CO.

Fig 8: Identifying ACPSW & ACCS Circuits & Connector Terminals (Explorer Sport, Explorer Sport Trac & Ranger)

Courtesy of FORD MOTOR CO.

Fig 9: Identifying ACPSW & ACCS Circuits & Connector Terminals (Explorer & Mountaineer)

Courtesy of FORD MOTOR CO.

Fig 10: Identifying ACCS Circuits & Connector Terminals (Windstar)

Courtesy of FORD MOTOR CO.