Headlight Upgrades
My daily commute is in the dark during the winter, and the primary obstacles are deer and skunks. So, it makes sense to put more effort into the headlights than I might if I lived in a city.
I purchased this Explorer last winter. Both lenses were frosted and one had water inside. I now have good lighting to the limits of my vision. Here is how I got there.
Step 1-New Housings
Frosted lenses are a fundamental problem. Nothing else you do will make a difference until you address this. I have been through the scratch removal process in other cars. Initially I used a range of sandpaper down to 1200, then rubbing and polishing compound.My experience is that the polishing has to be redone every 6 months or so, where I live. I believe that is because any polishing effort removes any scratch/UV protection. I have recently seen kits that have coatings to restore UV protection.
For my money, given the leaks and the frosting, I'm going to new housings. They are about $70/pair all over the internet.
Step 2-Wiring Harness
This is another case of taking care of fundamentals before getting fancy. The existing electrical path for the headlights is something like 15 feet. The length and size of that wire determines a wire's resistance, essentially using up voltage before it ever gets to the lights. Others have found that simply installing a new harness improves their existing light output. You also need a harness if you are upgrading to higher wattage lamps, i.e. 9007 or just a higher wattage 9004. If you are thinking about adding driving lights, then again, you need a harness.
The new harness connects directly to the battery and one of the existing lamp sockets. It uses relays to control the lighting circuit, and 14 gauge wire for all power connections. In cross section, this wire is twice the size of existing wiring, runs for less than half the distance, and draws directly from the battery. End result: Ample power for any headlight configuration you might want.
suvlights.com is where I went, based on recommendations here on the forum. It cost about $65 shipped. Now, you can search suvlights on this forum and read everyone's rave reviews. I'll say this: I believe in soldering, shrinkwrapping, everything I can do to get the most reliable connections. I can tell you this harness is hand-crafted from the best wiring and parts. They are made to order, so expect 2 weeks or so for this to arrive. It will be worth it. The only thing I did was to swap in 80 amp relays for the 30/40 amp that came with the harness. The system is fused far below 80 amps, but my reasoning is that they have silver contacts (I took one apart and inspected it) and that means longer life, fewer issues. I ordered 3 of these relays to test, will order more next week to convert my entire distribution box.
You may be asking why you would spend $70 for something that may not give you a huge improvement. The answer is that you are removing a bottleneck in the wiring system which will not only improve your existing lighting but allow you to do further upgrades more successfully. And, your other electrical goodies will benefit from reducing that bottleneck too. I was getting ready to upgrade my alternator because I was getting dim lights and slow blinkers with everything on. The harness fixed all that too, so $140 saved and diverted to Christmas presents! (or a new toolbox... decisions, decisions)
Installation is very easy, you will want to take out the top radiator screws to pass the harness with the existing harness run there. You need to find a way to get to the wiring side of the passenger side. That means removing the battery or taking apart the grill. Your choice. Other than that, it's all plug and play.
Step 3 - Bulb upgrade
I understand the easy step is to go buy some fancy-name bulbs and just put them in. Have you done steps 1 and 2 first? No? Why spend your money on expensive bulbs when you don't have a system to take full advantage of them? Get your foundation done first, then shop for bulbs. If not, you are truely wasting your money.
Now, which bulb? Assuming you are willing to spend time learning and then aiming your lights, and only in that case, I suggest breaking the law! The 9004 bulb is available via the internet in 80/100W configuration. Hella makes 2, one halogen and one Xenon.
I tried the halogen first, it burned out in one day. I got amazon to send me a replacement, I installed it, and clicked the high beams, it immediately burned out. I didn't even get to close the hood. Sent that one back for a refund. BTW, I followed headlight procedures and was very careful not to touch the glass. In both cases, the low-beam filament burned out. I'm not even going to give you a link to those... man, they even say off-road use on them, and they just blow up when you use them the first time.
I moved on to
Hella Xenon, pretty much the only one I could find without a backorder. They were roughly twice as expensive as the halogen bulbs. I probably have less than an hour on them so far, but a lot of driving up and down my main road going from low to high to low again. I even opened the hood and adjusted them, and without thinking, let the hood slam with them on. No problemo. They say they are blue, and there is a light blue tint. The light from them is pretty much stark daylight white. I'm in city, county, and state patrol zones everyday, and I see in the crime reports the number of vehicles pulled over for lighting violations. I'm ok with that, I just have places to go, so I'm going to make sure my lighting at least appears to be legal. These bulbs pretty much blend in with everyone else, just that they reach a lot further at night. Update: 2 weeks later, they are still going strong. That's crazy I'm updating after 2 weeks, but given the first ones didn't make it out the driveway... there ya go.
Good stuff:
I'll say this one more time, just in case you skipped to the bottom. Do not do the bulb upgrade without doing the harness upgrade. You will do nothing but make your wiring hot and burn out your headlight switch. Do not do the bulb upgrade unless you are willing to spend some quality time aiming them.