Abs light on in my ford ranger 1999 - Ranger Ford Cars & Trucks

Fuel shut off switch may need to be reset. A friend of mine had it trip when he had a flat tire some years ago on ford car. The reset on his was behind the plastic piece to the right of where the video below. Video below shows fuel shut off/inertia switch on upper floorboard passenger side.
Inertia Switch Explained Removed and Replaced 98-12 Ford Ranger - YouTube
2002 Ford Ranger Fuel Cutoff Switch - YouTube
You can try swapping out your fuel pump relay to make sure the relay is not bad. Below link may help
1999 Ford Ranger Fuel Pump Relay, Fuel Pump Fuse & Starter Fuse Location - YouTube

an abs sensor is failing have scanned for trouble code will probably have a pending

You are having trouble with the ecm. Have a scanner hooked up to test the ecm

Maybe you have a bad speed sensor, its a shot in the dark but that sensor controls a lot of functions like the ABS, speedometer, check engine light can come on, automatics will shift hard or may not shift at all, o/d will flash. The video below shows a 1999 ford ranger automatic but if you check you might have the same sensor.

On vehicles equipped with antilock brakes (ABS), a second warning light is provided to warn if a problem occurs within the ABS system. The ABS lamp comes on when the ignition is turned on for a bulb check, then goes out after the engine starts. If the ABS warning light remains on or comes on while driving, it indicates a fault has occurred in the ABS system.

What happens next depends on the nature of the fault. On most applications, the ABS system disables itself if the ABS warning light comes on and remains on.

The brake pads and shoes are not elec., your abs light is on because your abs computer pick up a bad signal from one of your abs sensor's,, take it to any auto parts or some one like autozone where they can do a code reading and get back us with the code so we can help you diag. your trouble code.

Sometimes this works, ABS light on, check engine light on, speedometer not working, and the automatics start shifting hard or not shifting at all? One bolt and the part is cheap, its weird how one part controls so much.

check the hubs for vacuum leaksthe lines should follw the abs sensor wires

abs malfunction buy a new unit

It could be that changing the switch told the ABS there was a fault. Try removing the fuse for the ABS and waiting 5 minutes for it to reset. ---I had a small ABS issue with my Volvo and the ABS fuse had blown. Good luck-- and if this helped can you give a rating?