How to Repair Water Ingress in Car Headlights?

[VanBradley]

Poor sealing leads to water ingress and fogging. As for the left headlight not working, you can check the bulb and fuse circuit issues. Unplug the non-working bulb, turn on the headlights, and use a test light pen to check if there is power in the bulb socket. If there is no power, inspect the fuse circuit. If there is power, simply replace the bulb.