Bazinuk

Hi guys. Newbie here. HELP. Got a problem with drain on the battery. It killed the old one so I bought a replacement. Have recently bought a wiring harness for the Radio so I could put my old one in. No dramas there, after finally getting the right one, but the light behind the clock and outside temp now stays on permanently, even with the key out of the ignition. Figuring this must be the problem. Anybody else had this problem or know of a fix?? cheers