I recently removed an aftermarket radio to install a remanufactured 92 Deville delco in its place. Trying to get back to stock. I checked all connections and everything was working fine including all of the lights of the interior. I installed everything back in its place. A few hours later I went out for a spin.. turned on the headlights and all the dash lights went out including the aftermarket gauges, no tach, no turbo. But the radio lights worked. I turned the headlights off and I get the tach and turbo back on the spedo cluster. Head and tail lights work the entire time. Does any one know what might be going on??