the red brake lamp has never been on only the abs light
RABS Data Link Connector
Anti-Lock Brake Control Module C222
Verify the ignition switch is in the RUN position (engine does not need to be running). Next, locate the black RABS diagnostic connector C207. The diagnostic connector C207 has two mating halves, one of which has a black/orange (BK/OG) wire connected to it. Disconnect the two halves.
Attach one end of a jumper wire to the black/orange (BK/OG) wire side of the diagnostic connector C207. Ground the opposite end of the jumper wire by connecting it to a ground until the ABS light begins to flash. Grounding this wire should start the yellow ABS warning indicator flashing. If grounding this wire does not start the yellow ABS warning indicator flashing, go to the Symptom Chart.
The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include the following long flash in the count to obtain the code number. For example, three short flashes followed by one long flash indicates diagnostic trouble code 4. The code will continue to repeat itself until the key is turned off. It is recommended that the code be verified by reading it several times. This code will be used later for system repair instructions. It should be written down for future use. A diagnostic trouble code 16 is obtained when the anti-lock brake control module detects normal system operation.
RJ Thanks for the info on the ABS, It is 2 wheel abs, The problem was the rear sensor that is located on the rear axle, we ran across that totaly on accident i was rebuilding the entire rear end droped the axles left and right replaced houseing because the old one was cracked installed new sensor, bearings throughout the chunk and I think I tightend the pinion gear to tight has a little viberation in the rear my marked rubbed off the nut when i put it back together and like a idiot i didnt count the threads so i guessed at it and i think i over tightend it I cant think of anything else that might cause it to viberate just a little and i can hear it at high speed can you think of anything else that might cause that?