reset button on a 1991 buick roadmaster estate wagon hearse?

[Pilot]

Need to reset a indicator light on a 1991 buick roadmaster estate wagon hearse. I light currently on is a red abs/parking brake on the lower right side of the dash. I added brake fluid but it did not clear. I have tried disconnecting the battery cables. I have looked for a button aroung the glove box, and even around the fuse panel on the drivers side, and nothing. I have even tried turing the key to on, and pressing the accelerator 3 times within 5 seconds as indicated on other sites and still nothing. Autozone knew nothing either, and the plant has closed down in 2006. There must be a way to reset codes and indicators. Please help. Thanks