A while back I posted that my ABS light came on and wanted to follow up with my findings and fix. At the time I posted, it was suggested to have it scanned to see what codes were stored and that it was not possible to "flash and retrieve" with my system. I have the "bastard" 1995 Blazer with the OBD II plug with the OBD I system, so most shops didn't know how to do it or didn't have the right scanner. I finally found someone that took a stab at it and said it was the right front wheel speed sensor, but they didn't tell me any code numbers. I elected to do the repair myself and replaced both wheel speed sensors. When I was done, the ABS light was still on. Went back to the same shop and they couldn't figure out how to clear the code.

I did a little research and initially came up empty. Lots of info. on the "flash and retrieve" for OBD I, but since I have the OBD II plug, the pinout was different. I finally found info. on my system, where I am able to retrieve and clear ABS codes using a jumper wire and the ABS flash on the dash, much the same way I have retrieved codes from the ECM, but accessing the ABS system instead.

I retrieved Codes 21 and 23, which deal with the right front wheel speed sensor. I then followed the code clearing procedure and the light went off and stayed off.

John