Looking to see a diagram of front end on a 2002 ford explorer 4 wheel drive

There are a ton of them...not sure this is what you're looking for:

https://www.google.com/search?q=2002+ford+f150+4+wheel+drive+electronic+diagram&oq=2002+ford+f150+4+wheel+drive+electronic+diagram&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

firing order: 1 - 4 - 2 - 5 - 3 - 6.

all wheel drive vehicles have to work at both ends all the time unless you have a major failure in the drive train. That is why it is called all wheel drive as opposed to 4 wheel drive. With 4 wheel drive you have the option of rear wheel drive or 4 wheel drive and normally in a high ratio or low ratio gear selection. With some all wheel drive vehicles there is a selector that locks the middle diff and creates a 4 wheel drive option without the high/low gear ratio option. So in practice if the both front wheels are in the bog then there is no all wheel drive as the centre diff is working as it should and placing all the action in the rear wheels which will not be turning as they have traction so the front wheels spin faster.. If you have a centre diff lock option ensure that it is operational.

Best bet go to library see if they have manual there then look under front end

Or brake hose

Ford Explorers are either RWD or 4WD

Bad differential or broken bearing on the rear axle.

it could also mean a low fluid problem. I'd check that first.

well i have the same explorer that you do and it is my first ford i have the same thing this is after doing the rear end 1200$ trany was 1000$ transfercase was 1100$ and now it is doing the same as yours in my oppin ford exploders are **** i will never buy one again sorry for your problome but ya yours 1000$ to 1500$ fords exploders ****!!!!!

Go to the engine compartment where the relays are located with the fuses. Check or replace the 4 wheel auto engage relay , maybe is not working. Is very clearly mark, I believe is the top right one looking at the bost front front of vehicle to the back. There is a diagram drawing of each relay in the cover, so you can't go wrong.