Fix abs light to go off and 4wh drive light flashing

some times they tie in another circuit to a check engine light , i have that happen with the emergency brake light on and engine check light

cant by pass problem with abs brake see lights flashing there is a problem with abs brake system need fixing could have brake failure.

I just had the same exact problem. The ABS light was on constanly, and the 4x4 high light flashes about 8 times, turns off for about 2-5 minutes, then flashes again for another 8 times and keeps repeating. In addition, I was also hearing and feeling a grinding and clunking noise going in reverse, and the steering wheel was difficult to turn. I changed a bad hub assembly on the front driver side and everything went away...fixed! I wouldn't let anybody tell me that the ABS system and the 4x4 system are not linked together. In fact, my local Ford service department assured me that I had two separate issues. Well, I only had one issue and it was a bad ABS sensor. I hope my exprience helps you.

This is purely a guess, but it seems to point towards the four wheel drive High and Low range, (Transmission)

the 4wd acuator is stuck the clicking you hear inside the car is the relay sending power to it if you have acces to a lift somtimes if you tap on the acuator it will engage the motor if you havent used it in a while

check and clean speed sensors at wheels

Check to see if the plugs on the wheels are plugged in check that the pins are all the way into socket, that your ABS problem, next check to see if you knocked loose the wire on the differential most likely cause and be sure to top off power steering fluid. Check that the fluid level is ok on the Diff. if you need more help let me know and thanks for using Fix-ya and rate if this was helpful.
Avid101

yeah my abs has flashed for years now= bad sensor wont affect your driving

Are you absolutely sure it is the ABS light that is flashing?

Also, to confirm descriptions, when you state that when you try to turn it back on you get "nothing, doesn't even crank" are you saying there is no click for the starter relay, no starter engagement, and the engine doesn't spin over?

Your description of the noise when you turn the truck off sounds a bit like the sound a muffled backfire might make. Maybe the truck is running really right, but that wouldn't explain the ABS light flashing. It could explain the Check Engine Light (CEL) flashing as running rich enough to backfire would be an emissions issue which would cause a flashing CEL.

replace old hubs with new ones