Abs and brake light on ram 1500 4x4 2000?

I'm assuming that your problem is that your ABS and or brake light is on in your Ram 1500? If that's the case you may have a problem with your ABS or your brake system as a whole. Check your brake fluid (being careful not to touch it with your bare hands, brake fluid is toxic), if it's low, get it filled. If the brake fluid isn't the problem, take your Ram to a mechanic and have the brakes inspected. You'll want to do this sooner rather than later as your brakes are obviously a critical component of your vehicle. check the sensor on the rear differential, I had the same problem, it takes about 15 minutes to install