ABS light on 1993 F-150 ext cab is on and off

Hey man The ABS light is most likely a speed sensor out of range. It will not effect normal braking function. You have already spent a ton of money. Chasing an ABS light fault is not cost effective and you wont feel the difference. ABS problems are a dealer only option(expensive). Take that ABS bulb out of the dash and forget about it.

I'm almost positive that you will find the inner bearing in the back of the brake rotor behind an oil seal. replace the oil seal when you do the bearing. Remove the brake caliper and the center axle nut and the rotor will literally fall off. Hope this helps.

I replaced the hub bearing assembly on drivers side twice and the light stayed on and the brakes worked fine. It was the wires (visible just above the tire on the frame) that rubbed against the frame that had shorted out. It was simply repaired and clip-stripped up out of the way. The light has been off every since then.

did you bleed the ABS bleeder valves too?
if no do so

Is your ABS light on? If so, you have a bad wheel speed sensor at the LF wheel. Or, you may have rust buildup on the teeth that the speed sensor measures. Pull off the axle, and check the toothed gear that resided in the spindle.

If not, you may havea sticking caliper piston, or inadequate lubrication on the caliper slides.

make sure that the abs connect for that side is connect properly and the right amount of brake fluid is there

Joe it is common for the brakes to moan when they wear down and sometimes they will squeak, try replacing the front pads and lubing the shafts on the calipers install anti squeal on the back of the pads, the ABS device would not cause noise as they are just a ring with a magnet and the reluctor ring spins and the magnet detects the spinning of the reluctor ring, they don't even touch and are stationary in place where they are mounted. There is a possibility that the brake fluid is dirty and could cause the abs motor to groan but you would just have to flush the system, When you don't put your foot in it on the brakes it will make some noise even new, I have a 2008 ford ranger that makes the same noise and the brakes are fine. You will have to adjust your braking habits to stop the noise. You can change the pads and that will help but not for long, be sure when you are operating your brakes press firmly on the pedal until you stop. If the brakes make noise after you let up on the pedal then the caliper parts need to be cleaned and lubed, however it is not a safety issue.

u will need to check the wheel speed sensors behind the brake rotors to see if they got damaged or disconnected during the brake job, as long as the ABS light is on the Anti-lock brake system is disabled, regular braking without the need of ABS will feel fine.

REAR WHEEL BEARING/ HUB

Removal Procedure

1. Raise the vehicle. Refer to Vehicle Lifting in General Diagnosis.
2. Remove the wheel and the tire. Refer to Tire and Wheel Removal and Installation in Wheels, Tires and Alignment.
   1. Remove and support the brake caliper. Refer to Brake Caliper Replacement (Front) or Brake Caliper Replacement (Rear) in Brakes.
   2. Remove the brake rotor. Refer to Brake Rotor Replacement in Disc Brakes.
   3. Remove the ABS sensor wire connector.
   4. Remove the four bolts from the control arm.
   5. Remove the hub and bearing from the control arm.
   6. Remove the brake shield from the control arm.
   7. Clean the control arm face and the bore before installing the hub and the bearing.
   Installation Procedure
   
   Notice: Refer to Fastener Notice in Service Precautions.
   
   1. Install the brake shield and the hub and the bearing to the control arm with the four bolts. Be careful not to drop the hub and the bearing, as it could be damaged. Reconnect the ABS sensor. Tighten the hub and bearing bolts to 70 Nm (52 ft. lbs.).
   2. Install the brake rotor. Refer to Brake Rotor Replacement in Disc Brakes.
   3. Install the brake caliper. Refer to Brake Caliper Replacement (Front) or Brake Caliper Replacement (Rear) in Disc Brakes.
   4. Install the wheel and the tire. Refer to Tire and Wheel Removal and Installation in Wheels, Tires and Alignment. Tighten the wheel nuts to 140 Nm (100 ft. lbs.).
   5. Lower the vehicle.

have you check? the master cylinder. sometine when you get the rotors cut they dont come out right because they may be warped or to thin. if you did the job yourself you might have put the calipers in on the wrong side. this happens alot . if your rotors front and rear are fine then switch the calipers to the other side.