Dummy Lights will not go off, ETC!!!!

I need HELP!!! I have an '86 32e that I am fixing up...evrything is going good except I CANNOT get the Brake light dummy light to go off!! I have changed the bulb, board, everything short of the relay sensor itself!! Any ideas ANYONE???
Also, Anyone know where I can order body accessories from? I can't find the "ground effects", dash, or seats for my car anywhere! The ones on it are worn and warped and I'd like to get some OEM stuff, but I cannot find a retailer! AND I want to get my tach working! It quit while I was overseas and I have no clue where to begin! Someone said something about batteries in the dash, but my service lights and speedo work fine. Thanks for all the help!

In mine, it was the PCB on the 3rd brake light, it had a cold solder problem on one of the wires. When I resoldered the PCB, the Check light went away as soon as you hit the brake pedal the first time after starting.