Don't know if this will help. I had the same kind of problem on an early 90s Chevy truck. A small amount of water got behind the lens cover. When I hit a bump the water would splash onto the bulb. Burned out 3 bulb before I noticed the water.
No, there is not a reset button on the Nissan Xterra. However, there is a reset button on the clock in the Nissan Xterra to change the time. To reset the car, a technician would have to use their computer.
If one needs to buy Nissan Xterra parts then the best place to try would be your local Nissan dealer. Other possible retailers include Nissan Parts Zone and Everything Nissan.
The oil dipstick in a 2000 Nissan Xterra Se would be located under the hood of the car. It would be located on the right side of the car and have a yellow colored cap.
Where it would be regularly but behind a splash guard you have to remove
A sixteen year old may have apprehension about driving such a large vehicle as a Nissan Xterra. You should talk over major car buying decisions with the 16 year old. However, the Nissan Xterra has great safety ratings, so it would be a good option for a sixteen year old.
You would disconnect the battery terminals.
I would try a junk yard in your area. Otherwise, you can order one from any Nissan dealer.
I know that the ECMs are the same. If the mounts match up I would go for it.
One can purchase a 2000 Nissan Xterra from the following places: Edmunds, Kelley Blue Book (KBB), Yahoo Autos, JC Whitneys, Crutch Field, Auto Anything, Car Gurus, Auto Parts Warehouse.
Check your fuses.
This is a wiring issue. If the switch were the issue, the light would not turn on at all. Sounds like something is wired backwards, or there is a cross short. If there is a short to ground, you will be blowing fuses and possibly burning up relays. Consult your vehicle's wiring diagram to ensure the aftermarket headlights are wired correctly.
Yes. If you live where it gets below zero I would use 5w30 at least in the winter.