PARKING BRAKE LIGHT GOES ON AFTER DRIVING

92 3500 6.5turbo does the same thing and no one knows. light will come on at exactly 35mph every time every day like clock work. been that way for 6 years now ;)

Yep, I noticed, it comes on @ 35 mph. But what is strange, it does NOT do it all of time, just some of the time. For awhile, it is all the time, but sometimes it doesn't, and did not when I got the truck about 1 year ago, until soon after I had some brake line replaced. I was told there is problems with the anti-lock brakes on that year, and maybe that is the culprit. I am wondering if the computer is reset (disconnect the battery for maybe 15 minutes might reset the computer, and maybe that will take reset that error code triggering the brake light coming on. ..... I would really like to get rid of that coming on, besides disabling the brake light all together. Any additional thoughts are gladly welcomed.