Common Problems of Lexus IS300 Tail Lights
Your Lexus IS300 tail lights are some of the most useful safety components in your vehicle. However, constant use of your tail lights coupled with a few kinks in your car's electrical system will eventually cause it to fail. Unless you want to risk getting a traffic violation, you have to act fast if your tail lights fail. Here are some of the most common causes behind faulty Lexus IS300 tail lights:
Blown left or right tail light
If your car's tail light is non-functional on only one side, then it is very likely due to a bulb that has completely burned out. Take out the bulb from the faulty tail light and check if it is really damaged. In some cases, a corroded bulb socket can also be the reason behind the blown tail light. If replacing the bulb and the socket doesn't work, you can also try checking for an open circuit in the wiring. Use a digital ohmmeter or a digital multimeter to test for continuity between the wires and the light itself and look out for an open circuit or no circuit reading.
Both tail lights not working
Faulty or loose wiring connections are some of the most common culprits behind two non-working tail lights. Examine your wiring system and tighten any loose connections. You can also check the fuse of your tail lights, since a blown fuse is also likely to cause both of your tail lights to fail. Replace your defective fuse immediately to restore the functionality of your tail lights.
Other things to consider
Rust is a major cause of damage for both your tail lights' bulbs and wiring connections, so be sure to check for rusting issues on both components. It would also be advisable to identify why moisture is seeping into these areas, so look for cracked tail light senses and some sort of leakage around the wires. Remember that replacing the blown bulb on your tail lights might resolve the problem temporarily, but it will only burn out again if the root cause of your tail lights' failure is not resolved.