I have 20" rims put on my 2000 montero sport xls. I promise to put up pics as soon as I have a free moment. But ever since I had gotten my brakes replaced, the 4 wheel drive light keeps flashing and the anti lock light comes on every now and again at the same time the other one is flashing. WTF? Also does anyone have a injen cold air intake installed in thier montero sport? if so how easy was the install and do you have any pics? I am getting mine in friday and I am unsure on how to do it. Any and all help would be appreciated.

Try this link to explain your 4WD operation and the lights. Sorry can't help with the other questions.

http://4wd.blogeasy.com/article.view.run?articleID=104949

Jim

Having the same problem as you on my shogun sport, 4wd light flashing when i select 2wd and abs light coming on from time to time. After taking advice from here and using all the imfomation from the link above this is what ive found so far.
One of my solonoid valves was dead so i replaced it, still flashing. checked the whole vacuum system and had no faults there. Then while checking the 12v supply to my solonoids i discovered that although i had got the required 12vs there was not enough current to switch the valves. I then found a cream coloured box to the right of the drivers footwell (right hand drive) which supplies the power to the solonoid valves, the imput to this is fine but the output which goes to the solonoid valves isn't enough to work them. I have proved this by putting the 12v supply for this box straight to the output for the solonoid valves.
Idont know what this box is called or ehere you would find it on your vehicle.
I have posted a picture of this box under the heading WHAT IS THIS.
I will soon replace this box and will let you know if it is the cure.
IF you have not already sorted yours out hope this is of some help.

my problem was the 4wd control unit, exact same symptons as you, hope you get yours sorted.

Hi, I drive a 2000 montero sport and I have the same problem.
U said "4wd control unit" what is this, and where can i find it please..

That link didn't work for me for some reason, however this one did...
http://4wd.blogeasy.com/article.view.run?articleID=318776

my 4wd unit on shogun sport was found behind the panel at the right hand side of the pedals ( right hand drive ). What i did before i changed this was to make sure everything else was working as it should. First i found one of my solonoids was faulty and replaced it. This did not stop the 4wd light flashing, to make sure my vacuum system and solonoids were working i swapped the two pipes over on the front of the solonoids then when in 2wd the light went out, this shows that you are getting vacuum and that your actuator on the front axle is working it doesnt mean the solonoids are working you may need to remove them and test with a 12v battery you will here a distinct click from the solonoid when connected to a battery if it is opening. when you have proved that your solonoids work then swap over the pipes on the front of the solonoids ( leave the pipes that go to top of one and bottom of other ) when swapped start and run engine for a short while to build up vacuum your 4wd light should now go out in 2wd and flash in 4wd. If all this is happening as explained then and only then should you suspect the 4wd unit. When i got to this stage i put a test meter on the plugs to my solonoids and got a 12v reading at first i couldnt see why my solonoids werent opening but there was not enough current to operate them, then i went to the 4wd unit pulled the plug of it and with the test meter identified the 12v supply to the 4wd unit and linked it to the 12v feed for the solnoids ( this was easily identified because of colour ) you can now check to see if the solonoids are operating by going from 2wd to 4wd and back several times and listening to the solonoids you will need someone to assist you for this. I did all this and one by one eliminated possible faults, Mine was a faulty 4wd unit you may find something else before you get that far. Hope this helps!

I'd bet when the solenoid goes bad, it can short out thereby shorting power to the 4wd computer/controller making it also go bad. I know a similar problem exists with the Idle Speed Controller.

Sounds like the likliest cause for the 4wd unit to go down, couldnt find any fuse protecting it when mine went down.

I am having this problem also and the link you refer to doesn't work, I think it may be to old. Any help much appreciated