[GuyO]

Hi Dave, I have done this twice and it works good. I think I found it in the under $50 mods thread. Sorry about the pics, (too late to try to fix them)! The link said, "I mounted a brake light switch that is normally open on the parking brake bracket, I grounded one of the two connections to the bracket and ran a wire from the other connection to the brown brake wire on the master cylinder. Now when the key is on and the parking brake is engaged the "brake" light in the dash lights up until I release the parking brake. It was a ten minute operation and works perfectly.
This is the switch with the brake engaged and the switch closed, activating the "Brake" light in the dash. The Brake light on with parking brake on and key in run position. The light goes out when the key is off or in the acc position. Note the splice could be placed anywhere along the (20 TAN 33) wire circuit"