Readiness For Inspection/Maintenance (I/M) Testing; Exterior Bulbs; Replacing Exterior Bulbs - Ford 1998 Expedition Owner's Manual

Please consult your "Warranty Guide" for complete emission warranty
information.

Readiness for Inspection/Maintenance (I/M) testing

In some localities, it may be a legal requirement to pass an I/M test of
the on-board diagnostics system. If your "Check Engine/Service Engine
Soon" light is on, refer to the description in the Warning Lights and
Chimes section of the Instrumentation chapter. Your vehicle may not
pass the I/M test with the "Check Engine/Service Engine Soon" light on.
If the vehicle's powertrain system or its battery has just been serviced,
the on-board diagnostics system is reset to a "not ready for I/M test"
condition. To ready the on-board diagnostics system for I/M testing, a
minimum of 30 minutes of city and highway driving is necessary as
described below:
First, at least 10 minutes of driving on an expressway or highway.
Next, at least 20 minutes driving in stop-and-go, city-type traffic with
at least four idle periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete.

EXTERIOR BULBS

Replacing exterior bulbs

Check the operation of the following lamps frequently:
Headlamps
Foglamps
High-mount brakelamp
Brakelamps
Parking lamps
Turn signals
License plate lamp
Tail lamps
Back-up lamps
Maintenance and care
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