Why does the service advancetrac light keep coming on and now truck stalls?

that is brakEs, failing
in order of cause.
bad brakes, (the real deal ,brakes bad.) pure mechanical.
ABS failing for above, or scan ABS now.
Advancetrac (means, Electronic Stability Control (ESC))
if any of the above FAILS ESC GOES OFF LINE.
SO ESC IS LAST,
WHAT TO DO IS GET THE BRAKES ON THE CAR FIXED. FIRST.
FULLY SERVICED,.
ABS CAN NOL HIDE BAD MECH, BRAKES, (A TAD WEAK SURE)
THE LOUD COW BELL SOUND (******* HERE), MUST BE BRAKES FAILING OR CALIPER PINS SEIZED.

The AdvanceTrac system counteracts oversteering and understeering by reducing power and/or applying brakes to specific wheels. This is done by the use of electronic sensors that communicate with the Powertrain Control Module (PCM) regarding steering performance and stability in adverse weather conditions. The are several components that are necessary for the AdvanceTrac system to work properly.
Anti-Lock Brake System-When/if the brakes lock up, this may cause a loss of control and the vehicle may slide. The anti-lock brake system prevents this from happening by preventing the brakes from locking up, as well as preventing oversteering and/or understeering when the vehicle starts to slide.
Traction Control System-The traction control system works by reducing engine speed and determining which wheel to apply brake pressure to in order to prevent the vehicle from sliding.
Electronic Sensors-The Powertrain Control Module (PCM) receives information from electronic sensors regarding the rotational speed of each wheel, the horizontal motion of the vehicle, and the vertical motion of the vehicle.
If the "service AdvanceTrac" warning indicator light comes on in the dashboard, this could be an indication of several issues.

• A faulty wheel-speed sensor
• A faulty steering-angle sensor
• A faulty rotational-speed sensor
• An issue with the steering rack
• Something that is lodged in one of the wheels
• The AdvanceTrac system needs to be reprogrammed

You need to take in for repair.
https://repairpal.com/advance-trac-warning-light

When this light flashes it means the control module for the traction control system has sensed a fault has occurred. When this light is flashing a fault can be read by a special scanner that the dealer is equipped with.

No it is not fine and there is a problem, otherwise the light and beep would clear. Has the dealer scanned the system?

sensor dont take to long to change and the price depends on were you get it from, but you need to know it is a sensor failed or just blocked. road muck can get stuck in there and give a failed sensor. the message you are getting is it needs to be serviced when the sensor is changed it can take upto 10 meters for the abs to reg the signal. if no abs and speedo jumps its the front pass side sensor. its more common for the front sensor to fail as they get the most rain/muck on them when turning. they rust up.

Yes, using a tire of a different size will likely set the lights. Not sure what your local emissions test requires, but I would not put a bunch of miles on the car with the spare.

Lincoln LS or 05 Explorer?

Check for Codes,you should know and have done that already

Could be a Wheel Speed Sensor,if advance trac is on,if an LS

Still need to have a shop diagnose ABS System, to find component
fault.