Hi John, Your '61 uses a flat Electroluminescent panel to illuminate your pushbuttons. The panel is mounted vertically inside the heater/AC pushbutton "stalk". This panel transfers the soft green glow to the clear pushbuttons from behind the dash. If the EL panel shorts out, none of the instrument cluster, pushbuttons or radio dial will light up. If only the heater/AC buttons do not work, you either have a bad panel (not likely) or a bad connection to the panel (not getting any AC current from the power pack). All EL wires behind the dash will be WHITE WIRES WITH RED CONNECTORS. If you find one hanging i.e. disconnected, that's most likely the culprit. Beware of these white wires if you have the panel lights on. If you touch one of them near a connector or EL panel, THEY WILL SHOCK YOU SOMETHING FIERCE!! I believe that there are only 6 incandecent light bulbs in the entire dash for '61 through '63 Imperials. Starting from left to right... 1) Left-turn signal indicator 2) Parking brake warning light (cluster) 3) High-beam indicator (cluster) 4) Right-turn signal indicator 5) Map light 6) Glove box light Hope this helps you track down the problem. Imperial regards, Jay Mc Kee 1962 Crown Southampton four-door