94 Ranger, 4.0L, Standard Cab / Standard Bed, 5 speed, 214,000 miles.

ABS light stays on all the time, BRAKE light comes on once brakes are applied for first time and also stays on for remainder of time till truck is turned off.

Had to take the bed off to put new fuel pump on, so I went ahead and replaced the ABS sensor that goes into the rear diff while I was already there, hoping that would maybe fix the abs issue, but it did not.

Just wondering what to try next. How many more abs sensors are there on the truck and which of them should I try replacing next?

Thanks.