Ford 2002 Excursion Owner's Manual page 35

IF THE ENGINE RUNS HOT
The following could cause the engine to overheat:
Lack of coolant.
Dirty cooling system.
Driving with frozen coolant.
Sticking thermostat.
Overloading or pulling heavy trailers during hot weather.
Grill or radiator air blockage.
Slipping or missing drive belt.
Plugged or very dirty air cleaner element.
IF FUSES BURN OUT
Burned-out or blown fuses usually indicate an electrical short-circuit,
although a fuse may occasionally burn out from vibration. Insert a second
fuse. If this fuse immediately burns out and you cannot locate the cause,
return your vehicle to your dealer for a circuit check.
Replacement fuses and circuit breakers must always be the same
rating as the original equipment shown. Never replace a fuse or
circuit breaker with one of a higher rating. Higher rated fuses or circuit
breakers could allow circuit overloading in the event of a circuit
malfunction, resulting in severe vehicle damage or personal injury.
Refer to the "Owner Guide" for replacement of fuses.
Minor troubleshooting guide
35