2. Look for a blown ABS fuse (located in the relay center). If the fuse looks good, replace it with a new fuse and drive for a few miles to see if the ABS light goes off.
3. If the fuse and fluid level are good, it is likely that there is a problem with an ABS wheel speed sensor. To fix this, you will need to take your Chrysler 300 to a mechanic to have them diagnosed.