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:
- Wiring Harness Circuits (ACCS, ACPSW, VPWR & WAC). See Fig 1-Fig 11
- Faulty A/C clutch Relay
- Faulty Powertrain Control Module (PCM)
Fig 1: Identifying A/C Clutch Relay Circuits & Connector Terminals (Blackwood, Econoline 4.2L, Excursion, Expedition, F250-F550 & Navigator)
Fig 2: Identifying A/C Clutch Relay Circuits & Connector Terminals (Aviator, Crown Victoria, Escape, Explorer, Focus, Grand Marquis, Mountaineer, Ranger, Sable, Taurus, Town Car & Windstar)
Fig 4: Identifying ACCS Circuits & Connector Terminals (Blackwood, Econoline 4.2L, Excursion & F150 Without Visctronic Cooling Fan)
Fig 9: Identifying ACPSW & ACCS Circuits & Connector Terminals (Explorer Sport, Explorer Sport Trac & Ranger)
Fig 11: Identifying ACCS Circuits & Connector Terminals (Crown Victoria, Grand Marquis, Town Car & Windstar)
A/C CLUTCH RELAY LOCATIONS
| Application | Location |
|---|---|
| Crown Victoria & Grand Marquis | In Relay Center, On Left Side Of Engine Compartment |
| LS & Thunderbird | In Auxiliary Junction Box, On Left Side Of Engine Compartment |
| All Others | In Battery Junction Box, In Engine Compartment |