FORD 2008 F-550 v.3 - Manual (Page 228)

3. Press and hold the brake pedal for two (2) seconds, then release.
4. Turn the ignition to OFF/LOCK (DO NOT remove the key.)
5. Cycle the ignition from OFF/LOCK to RUN three (3) times ending in
RUN. DO NOT start the engine.
If reset mode has been entered successfully, the horn will sound once,
the TPMS indicator will flash and the message center will display TRAIN
LF TIRE.
If after repeated attempts to enter reset mode, the horn does not sound,
the TPMS indicator does not flash and the message center does not
display TRAIN LF TIRE, seek service from your authorized dealer.
TPMS reset sequence
The TPMS system needs to be reset starting with the left front tire in
the following clockwise order:
1. Left front tire
2. Right front tire
3. Right rear tire
4. Left rear tire
2008 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
228