your rear bulb is blown - replace the bulb The turn signal blinks fast because the bulb is going out. That is also why the others dont blink.
Change the front turn signal light bulb. It's bad.
The 2002 Ford Expedition has 41.1 in. of front leg room.
The 2002 Ford Expedition has 39.6 in. of front head room.
The 2002 Ford Expedition has 63.4 in. of front shoulder room.
The 2002 Ford Expedition has 63 in. of front hip room.
The front track of the 2002 Ford Expedition is 5 ft. 5.4 in. (65.4 in.).
In front of the engine.
The 2002 Ford Expedition has rear wheel drive.
This is a common built in feature that is used to tell the vehicle driver that one of the turn signal bulbs is out.
On a 2002 Ford Expedition , 5.4 firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
Passenger side 2nd from front
Passenger side front of engine.