I have an 05 montana,and after having my winter tires put on they came loose and ever since the the abs light has been on and the abs pump was not working. I unhooked the battery and let it sit for a while. When i hooked it back up the light was out and the abs was working. After 10 minutes of driving it was back on and the abs was not working again.Any ideas would be appreciated

if the tire is still intact probably not
however the vibration in the wheel could have dislodged the sensor wire and that will put the abs light on/off

It should not.
The ABS system is only designed to aid your braking of your vehicle.
If the vibration is happening all the time you are driving, it should be a tire problem.
If the vibration is happening when you brake the car, it should be a warped brake rotor problem.
God bless your efforts.

Have the ABS wheel sensors checked they go bad a lot in this year 05

Sounds like a tier balance problem or the tire is starting to separate.
Look at your tires and inspect them for any protruding bubbles or bumps first.

1st check to see that all the lugnuts are tight. If that is not the problem you will have to go back to the tire shop and have the wheel balanced.

The computer you are looking for is called an ASC control unit and is located in the right hand side of the engine bay.
I advise you have the fault codes checked first as a new ASC control unit is not cheep and will require coding.

nope better to put on same size tire.because it will effect the abs brake system if one or two tires is smaller.

yes you can, basically you can just about put any size tire on as long as it fit however 215 is the height of the tires, by putting smaller or taller tires than recommended by the manufacture will effect you speed odometer. 70 is the width of the tires, the wider the better traction and 15 is the size of the tires that will fit the rims. Here is example...

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference 215/75-15 6.3in 13.8in 27.7in 87.0in 728 0.0% 225/75-15 6.6in 14.1in 28.3in 88.9in 713 2.1%

I would pull the fuse. I do not like traction control or abs personally and I pull the fuse on both. They tend to have problems in their circuits and the pumps and I do not trust them

above the bumber is ahole put the jack handle in it and twist it it will come loose