Best Answer

First check the fluid level if ok you need totake it to a dealer to find out what is wrong with the ABS. They set codes in the EBCM just like the engine does in the ecm and can be read with a scanner. Most parts stores con't read these codes.

Had this problem with my 1999 Ram 1500. There is a sensor at the top of the rear differential for the ABS system. That sensor went bad and replacing it took care of the problem. What caused mine to go bad was apperantly water got into the differential when launching and loading my boat. check to see if gear lube needs to be replaced also.

The answer above is perfectly correct. When the ABS sensor on the diff goes bad the speedo no longer will work, the odometer stops recording mileage and both brake and ABS light comes on. You also loose O/D or "Lock-up" in the torque converter. The sensor is inexpensive and can be changed in about 30 mins. Good Luck!

I second the second answer :) My ABS light was on, my BRAKE light was on, my CHECK ENGINE light was on, my SPEEDOMETER wouldn't work below 35 mph, then quit working alltogether. Once the speedomenter quit working the odometer and cruise control quit working. I replaced the rear differential mounted speed sensor ($33) and then reset the CHECK ENGINE light by disconnecting the positive battery cable for a couple of minutes. EVERYTHING then worked.

Replace rear differential speed sensor as follows:

a) remove parking brake cable bracket (1/2" socket)

b) remove speed sensor bolt (9/16" deep socket)

c) remove metal speed sensor cover

d) remove speed sensor from rear differential housing (use channel lock pliers, twist gently back and forth while applying upward pressure. Once the speed sensor has a small gap between it and the rear differential housing, insert a flat-blade screwdriver and gently apply upward pressure while gently twisting speed sensor back and forth.

e) disconnect speed sensor from speed sensor cable

f) lubricate new sensor with WD-40, insert into rear differential housing. It will NOT go in all the way by hand, so do NOT force it nor hit it with anything made out of metal.

g) replace metal speed sensor cover

h) Insert speed sensor bolt and tighten LIGHTLY until a small amout of pressure is felt. Tap speed sensor with rubber hammer until it pops into housing. Finish tightening of speed sensor bolt.

i) replace brake cable bracket, replace 1/2" nut and tighten

j) disconnect positive battery cable for 2 minutes, reconnect positive battery cable

h) start vehicle, enjoy, brag to wife and friends.

User Avatar

Wiki User

โˆ™ 2015-07-17 17:39:11
This answer is:
User Avatar
Study guides

Add your answer:

Earn +20 pts
Q: What could cause the ABS and brake light to come on a '99 Dodge Ram 1500 AWAB?
Write your answer...
Still have questions?
magnify glass
Related questions

What would cause the brake lights to not work on a 2002 Dodge Durango?

Check the fuses and if they are good then check the brake light switch.

What could cause the ABS and brake light to come on a Chevrolet sedan?

A brake fluid leak in the brake system, LOW BRAKE FLUID.

Would worn brake pads in 99 dodge durango cause check engine light to come on?

no for sure not

Where is the brake light fuse found on a 1996 Dodge Grand Caravan es?

Where is the brake light fuse found on a 1996 dodge grandcaravan

Why is your brake light coming on in your 2011 dodge grand caravan?

Could be the brake fluid reservoir is low which would be telling you the brakes need attention. Could be parking brake not fully released

What could cause the brake light to come on and stay that way on your 1998 jeep Cherokee classic?

A defective or out of adjustment brake light switch.

Which of the following COULD cause the brake warning light to come on?

Brake fluid in reservoir below acceptable level.

What does is mean when the brake light on a 1997 dodge avenger?

The red brake light on the dash means that the brake fluid is low or the parking brake is on.

What would cause the brake lights to go out on a 1998 Dodge RAM van 1500?

normal wear and tear. Brake light switch, bulbs or sockets.

What could cause left brake light not to work when the right and third brake light works?

something as simple as a burnt bulb or the wire to the light could of been stripped by rubbing against metal

Where is the Brake Light Switch on a 1992 Dodge 250 Diesel?

the brake light switch is on a bracket just above the brake pedal.

Could a bad brake light switch cause cruise control to not work?


People also asked