hey guys when i try to ues 4x4 the light will flash and not stop. the 4x4 will work but as soon as the front tires spin it with thru it out of 4 wheel drive... some one help me plz

What model are you running?

Drone raises a very important issue - you haven't told us what vehicle you're driving, leaving us to make possibly incorrect  assumptions.

I'm going to guess at a GV, but, depending on the year of the GV, the causes differ.

Oh sry guys new to the site haha 99 tracker 2.0 motor

A 99 Tracker - that should be similar to the 99 Vitara, which has a pneumatic freewheel system built into the front differential housing.

The flashing light is an indication that the pneumatic system is leaking somewhere, there is a pump module located behind the front bumper that turns on & off as necessary to keep the system pressurized when in 4WD and when the pump runs the light goes out - the occasional flash is nothing to worry about, but the more frequently it blinks out, the bigger the leak is.

Start by finding the pump - it's inline with the right of the radiator - it has two rubber hoses, one goes up the side of the radiator, and the other goes back down the frame rail and then along the crossmember to the differential.  Disconnect the hose going to the differential and plug the pump outlet and see if the 4WD light continues to flash - if it does, the leak is in the pump module, if the flashing stops, the leak is either in the tubing or the diff.

Pump modules should be available at the dealer, and if you're handy with tools, might even be repairable - the most common leak in the pump is caused by rust - I did a pictorial "teardown" that might help if you need to open up your pump.

wow amazing dude thank you so much!!!!!!!!! tomorw ill check it out and i let u kno what i find but thanks again with all that good info!!!!!

I have had leaks in the rubber tubing.

yup the pumps fine must be the tubing when it worms up this week ill look more in to it!!

If the pump's fine, the next step is to reconnect the tubing to the pump and disconnect the other end where it goes into the differential, and plug it there - if the light flashes the leak is between the pump and the plug, if not, it's in the differential.