Anyone experienced the 4WABS light coming on and staying on while driving?

 

Yep.

First thing you should do is make sure all the sensors are clean of metal shavings. If that doesn't help check the sensors for resistance. IIRC they should be around 780 ohms. Test with digital voltmeter. The rears are a complete PIA, the plugs are under the bins, checking/replacing them requires bin removal. Hope it is the front sensors.

You also could have a bad pump or ABS computer. In 4 yrs of messing with FDs I haven't seen a bad ABS computer, that is probably why I have 5 of them sitting around. Pumps leak but I haven't seen that cause a light.

My bet is on a bad or dirty sensor.

Good luck!
Jeff

 

Most of the time it's a dirty sensor. I get that every now and then. What usually works is a nice car wash spray gun to the rims.

 

I hope that spray thing works, because my light is on as we speak. I hear those sensors are a little expensive. It can also go on when you're low on fluid, although I don't know if it would stay on all the time.