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Home >> Merkur >> 1986 >> XR4Ti Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> A/C System Diagnosis - Manual >> Thermostatically Controlled Electric Fan (Fwd Models, All 2.3L Engines With A/C & 3.8L CAPRI/Mustang) >> Engine Cooling Fan Circuit Electrical Diagnosis

Engine Cooling Fan Circuit Electrical Diagnosis

If fan is not operating properly, disconnect fan motor wire connector and connect it with 14 gauge wire to a good 12-volt battery. If fan runs, motor is all right, indicating car battery, coolant relay, timer relay, or A/C relay may be defective. If fan motor does not run when connected directly to a good battery, replace fan motor.

Fig 1: Thermostatically Controlled Electric Fan
G73544
Fig 2: FOT System Diagnosis (Capri, Continental, Cougar, Escort, EXP, LTD, Lynx, Mark VII, Marquis, Mustang, Tempo, Thunderbird & Topaz)
G15648
Fig 3: FOT System Diagnosis (Bronco, Bronco II, Crown Victoria, E" Series, "F" Series, Grand Marquis, Ranger & Town Car)
G15649
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