- The headlights on my Lincoln already look old and hazy. There are also some scratches. What would be the best way to polish these headlights to make them look new?
After cleaning off the surface dirt and masking off the surrounding area, you have to sand the lens' surface. Use a 1,000-grit wet/dry sandpaper. This must be soaked in cold water for about 10 minutes. The surface must be wet as you sand the lens. For best results, make sure that you rub the sandpaper in one direction. Use finer-grit sandpaper for pits, scratches, and discolored parts. Move on to 1,500-grit sandpaper or up to 2000-, 2,500-, or 3,000-grit wet/dry paper until the surface is clear from scratches. The final step is applying some polishing compound on the lens to keep it shiny, clear, and clean.
- When am I supposed to switch to high beams? When is it safe to turn on the high beams of the headlights?
High beams allow drivers to see further. However, these can also cause glare, especially on a two-way road or street. These beams are best used if there's no oncoming traffic, on one-way streets or isolated roads. When you spot vehicles from afar, you should switch them off. These beams can also be useful during bad weather, when it's harder to see through the road. The beams should be used with care. In snow, fog, or sleet, these can also cause glare.
- How can I protect the headlamps from stone chips and debris? Is there a way to keep them safe from scratches?
Light protection products or lamp guards can be used to prevent any form of damage on headlamps. These accessories come as urethane materials that are attached to the lamps through adhesive. These are optically clear, so they won't affect the lighting intensity or output. The best ones have UV inhibitors that keep the material from drying. This feature also prevents discoloration and hardening. Top-quality covers can even withstand impact from about 1" diameter stones hitting at a speed of 120 mph.
- How do I identify the source of electrical headlight problems? How can I properly diagnose headlight troubles?
To diagnose electrical headlight problems, you have to check the headlight bulbs first and then see if electrical components such as the wiring harness, fuses, or switches have failed. If the bulbs are all fine, test the wiring harness. You also have to inspect the fuse for discoloration or for any replacement need. If the fuse isn't the problem, the next thing you can do is use a voltmeter, where the negative lead will be connected to the battery's negative terminal while the voltmeter's positive lead goes to the positive lead of the wiring harness. If there's no power coming through, then the wiring has to be adjusted or changed. The problem may also lie with the switch. Contacts on the wiring block or switch may need some cleaning. If cleaning won't fix it, then the switch may already be defective and requires a replacement.
- What are good home solutions when cleaning my Lincoln headlights? Aside from dish detergent, what are the other options?
Dish detergent can be used for breaking up dirt. You just have to mix 10 drops of dish detergent with 1 cup of water. Paste made of toothpaste (make sure this is not a gel) and baking soda is another good home remedy. The headlights can be wiped clean using a cloth or scrubbed with a brush. Buffing will remove the film and residue. Cooking spray also does wonders. This not only cleans but also polishes the headlights. This can be used as a lubricant for the seals as well. Cleaning with cooking spray can make headlights film-free and shiny.
- How can I remove moisture behind the headlight lens? What would be the easiest, most effective way to do this?
You have to remove the plastic lens to be able to clean off the moisture that has formed inside. Be careful not to touch the bulb. Clean the inside of the lens using hot soapy water. Once the lens is already free of moisture, make sure that it's completely dry before putting it back on the headlight.
- The headlights have discolored. How can I treat the discoloration and remove the stains?
Baking soda or pumice would be a good solution for cleaning off the fine layer of the plastic's outer surface. Wiping the headlight or scrubbing it with baking soda using a wet cloth will be a good remedy for the discolored parts caused by stains and road salt. This is a good cleaning method for faded or foggy headlights.