Chart 17

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

Cooling System Concerns:

Electric Cooling Fan(s) Always Runs

NOTE: This chart is intended to only diagnose an electric cooling fan that always runs with a "cool" engine and the A/C and defroster off.

SYSTEM/COMPONENT	REFERENCE ( PINPOINT TEST - CNG, FLEX-FUEL & GASOLINE ) unless noted
Cooling fan circuits and ACPSW or ACP circuits	Crown Victoria/Grand Marquis, Thunderbird, LS6/LS8 and Town Car: VERIFY results of Quick Test. Visually inspect cooling fan for concerns. Freestar/Monterey, Aviator: Go to Cooling System check below (also check for over-pressurized A/C system) 3.8/3.9L Mustang: GO to X: Constant Control Relay Module (CCRM) STEP X39. 4.6L Mustang: GO to X: Constant Control Relay Module (CCRM) STEP X37. All others: GO to F: Fan Control relays STEP KF55.
Cooling System	Engine Cooling - Refer to the appropriate ENGINE COOLING article.

SYSTEM/COMPONENT

REFERENCE ( PINPOINT TEST - CNG, FLEX-FUEL & GASOLINE ) unless noted

Cooling fan circuits and ACPSW or ACP circuits

Crown Victoria/Grand Marquis, Thunderbird, LS6/LS8 and Town Car:
VERIFY results of Quick Test. Visually inspect cooling fan for concerns.
Freestar/Monterey, Aviator:
Go to Cooling System check below (also check for over-pressurized A/C system)
3.8/3.9L Mustang:
GO to X: Constant Control Relay Module (CCRM) STEP X39.
4.6L Mustang:
GO to X: Constant Control Relay Module (CCRM) STEP X37.
All others:
GO to F: Fan Control relays STEP KF55.

Cooling System

Engine Cooling - Refer to the appropriate ENGINE COOLING article.