Why abs and advance trac warning light stay lited on 2004 ford expedition ?

Did you hook the wire up to the seat buckle at the bottom?

Check Connections and/or Switch

find your reset switch and reset it

ABS light is on and advancedtrak light

You have an ABS System Failure ,issue

Could be a Bad Wheel Speed Sensor.

Have code retrieved,system diagnosed and repaired

Pull codes
Repair ABS System issues.

your ABS sensor is bad. check both of them They are right in front of the back brake pads. Hope this help :)

ABS SENSOR DAMAGED OR ABS SENSOR WIRE DAMAGED ,,TIS A **** WHEN THIS HAPPENDS ,HAVE TO PAY FOR A CAR DAGONASTICE TO SEE WHAT SIDE PROBLEM IS AT ,,THEN REPLACE SENSOR,,,JOB DONE,,SOMETIMES REPAIR WIRE AND REPLACE SENSOR

the switch in one of your doors could be sticking,spray each door switch with wd-40, look for the black rod sometimes curved with a groove in it ,spray generously

hi Deborah.
this is all i could find out from the internet.
ABS and Trac OFF usually indicate a dirty or faulty ABS wheel sensor. You'll have to scan for the codes to see why the check engine light is on.
the abs and trac is the wheel speed sensor, you will probably have to replace the hub.
Have you already checked your owners manual for troubleshooting? If not, page 3-35 has the section about your "Trac Off" message.

"If there's a brakesystem problem that is specifically
related to tractioncontrol, the tractioncontrol
system will turn off and the warning light will come
on. If your brakes begin to overheat, the traction
controlsystem will turn off and the warning light will
come on until your brakes cool down...
If the tractioncontrolsystem warning light comes on
and stays on for an extended period of time when the
system is turned on, your vehicle needs service."

not sure if this helps you out but its all i could find out.
sorry if its of no help to you.