Backstory (but maybe not pertinnent): I recently had an issue with rough running/idle. Got check engine light and codes of the P0300 variety (306 consistently). After checking this forum, I changed my plug wires and voila, the engine is running smoother than ever. Now, however, I find that my radio, clock and interior lights are not working. I have checked every fuse both visually and with an ohm meter. All good. Can't find any loose connections or dangling wires. What should I be looking at next?