My assumption was that there was a broken wire. Luckily, this is easily diagnosed just by performing a visual inspection. But if your headlight lens has acquired a major damage, use a coarser grain of sandpaper such as a 5000-grit sandpaper. If you suspect that your stock headlight assembly is no longer performing its job properly, you'd better prepare yourself to perform some troubleshooting. You must use good engine oil with this vehicle or else you will have an engine sludge problem and this could cost you a new engine. All of that was done with a 10 mm socket.
Unplug the large electrical connector from the top of the air filter box by pressing the tab on the plastic connector and pulling. It's toward the left side of the engine as you face the engine with the hood up the passenger side of the car. Remove 3 10 mm bolts from the bottom of the now empty air filter box and pull the box out of the vehicle to gain access to the starter. I took some pictures and thought I would put together a short guide to add to the information already out on the 'net. The most important part of the process is a chemical sealer that prevents the lenses from fogging up again or at least slows down the deterioration until the restoration process has to be repeated a year or three down the road. You will now see two 10mm nuts that hold the outside of the headlamp assembly in place, remove those and the one at the front grille and you're basically home free.
Oh well, another one fixed. What have you done, if anything to solve this issue? Push the cover in and turn clockwise an inch or two, and it should be nice and snug. The connector that I had been checking had a red wire but it had a black stripe. In addition to cleaning the headlight lens, you can also make your car's headlight look brand new. Also notice that the connector body is gray in color.
Remove the screw on the very corner of the fender, it looks like it holds nothing, but it in fact is a mounting tab for the corner parking light. One is located under air filter box,remove air filter box and sensor in located there,the other sensor in at a 45 degree angle on the transmission just behind the battery,remove the battery and tray to get better access. Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Headlight Lamp Assembly stock in-person! It may soon exhibit signs of wear and tear and cause all sorts of headlight problems like flickering and dimming lights. The hard part is done. Remove the front wheel behind the headlight in question. Disconnect the positive and negative cables from the battery. A composite headlamp can be replaced in a 'per part' , which is usually an aftermarket.
You have two categories for your own Lexus Rx300 headlight assembly according to its design, the sealed and the composite. Pull, force, the fender liner out of the way. The picture below is a little deceptive. When removing the spark plug, be sure not to let any dirt or debris fall into the engine. The connection to the bulb must be placed back in, exactly as it was before, or the spring will not latch.
You shouldn't need to replace that until 100,000-120,000 miles. Unplug the small electrical connector from that same box top in the same manner. Total time 2 hours for 2 headlamps. Now you can see that all lights work as they should. Start by removing the most difficult spark plugs - in this case, the back ones.
There is a thumb latch that has to be depressed to release the connector. Second Answerer says: That wouldn't work for a 2002 model! The next time you have a chance on some dark night on a lonely road check your distance night vision and then turn on the fogs and check it again. It looked great after the treatment. Once the bulb is in, reinstall the twist on cover. Without further due, here is his posting with awesome pictures for clarity.
If you can't find a urethane film, you can use wax or paint sealer every time you wash your car. I just changed it and it was the first time in forty years that I could not budge the filter! Further inspection of the wiring for the passenger side headlight assembly found that there was a brown connector fastened to the lower bulb. Dimming headlights are usually caused by dirty, yellowed headlights. Carefully, pull the liner away to expose what you'll need next. This includes the spark plugs behind the intake manifold. The two outboard bolts are different than the others so take note. Thanks for rating my response and for using FixYa! You will now see two 10mm nuts that hold the outside of the headlamp assembly in place, remove those and the one at the front grille and you're basically home free.
The back plugs are located behind the intake manifold see picture below. You see, this condensation buildup can cause lights to dim and impair your vision especially when driving during hazy or rainy weather conditions. He says that it is so expensive because the Coach Edition used a European headlamp. This will release the two small rear clips. The following thread has photos from the last time I stored headlight lenses: Refinishing headlight lenses is easy.
Inboard of either light is 2 screws, one high and one low, you can tell which ones are attached to the light assembly. You'll need a hex wrench to get these out. Headlights grow dimmer by up to 20% over time and eventually burn out - for this reason, we recommend changing your headlights in pairs. Some kits require using an electric drill and buffing pad - I don't care for these - too easy to get carried away with a mechanical device and grind through a lens. Although the headlight assembly is built to resist the vehicle's vibrations, it's still prone to get worn and damaged over time. By twisting on one direction and here you go the light out. Here's one: and another: Just not sure which side you need.