When I first tackled the exterior lights, most of them refused to illuminate—not because of bad bulbs, but due to corroded sockets. Some sockets were salvageable with a soak in vinegar and a good scrubbing with a wire brush, while others were beyond saving. In some cases, I was able to replace just the internal spring-loaded contact (aka the plunger) instead of the entire socket. I found compatible sockets at the local parts store, removed the plungers, and swapped them into the original housings—a trick I picked up from YouTube. Worked like a charm!
While I was at it, I upgraded all the exterior bulbs (except the headlights—those are pricey!) to LEDs. Finding the right ones took some trial and error, but the key was matching the LED color to the lens color for the best brightness and depth. Now, the lights are not only more reliable but also far more vivid and efficient.
