Hi - I have a '69 Shelby with a glove box/map light that won't turn off. It has a switched ground to turn it on and off by the glove box pin switch and the mechanical switch on the light housing. The thing is, it works perfectly when the clock dash-panel isn't fully installed (wired but pulled away from dash for testing). Once installed, the light is always on because it's being grounded by the metal construction of everything around it, screws, metal clock panel, light housing, and socket. My assembly manual doesn't specify but I'm wondering if there should be a gasket or isolator somewhere between these parts? Anyone else run into this problem?