The cleaner stands on front wheels and barely moves.

DO NOT RIDE WITHOUT YOUR BRAKES!
What exactly do you mean by "Pulls up"? Is it slowing down quicker than normal like your towing a heavy weight? Are there any new sounds the scooter is making. Comment below with this information please.
Try this. Do this with the engine OFF and the key OUT. Does your scooter have a centre stand? Set it on the centre stand and get a helper to lean on the rear of the scooter to keep the front wheel off the ground. kneel in front of the scooter and spin the front wheel by hand. It should spin easily. Pull ******* the brake lever and try to turn the front wheel. It should not move. Get your helper to move to the front of the scooter to hold the front wheel down and raise the rear wheel. Use the same method as the front to test the brakes. The rear wheel should turn smoothly with only a small amount of resistance from the engine and transmission and only lock solid when you pull ******* the brake lever.

Google found this:

it is behind the front passenger wheel fender

The battery is buried within the front section of the passenger side front fender.

Disconnect the neg battery cable close to the firewall.

Remove the bolts holding the air cleaner assembly in place.

(Removing the air feed tube from the air cleaner assembly helps)

Once this is removed, you should be able to see the battery hold-down bolts.

Remove these and remove the hold-down assembly.

If you are removing the battery, remove the 1st battery cable.

Depending upon what battery you have, you may be able to slide the battery back toward the wheel and disconnect the 2nd cable.

Jack the vehicle up, put on jack stands and remove the passenger side wheel.

On the front side of the wheel well there is an access panel that needs to be removed in order to access the battery. There are 6-8 1/4" screws to remove. Then manipulate the cover until you can remove it, bending it slightly.

If you were unable to disconnect the 2nd battery cable earlier, you can now move the battery further towards the rear of the car. Remove the 2nd cable clamp from under the hood.

Slide the battery all the way out. It is heavy!

Reverse the instructions for reassembly.

Hope this helps.....


Read more: http://wiki.answers.com/Q/Where_is_the_battery_on_a_1998-2004_Chrysler_Concorde#ixzz28j7Sd3O0

Which one front or rear?

it could be a lot of things (tie rod ends,ball joints,wheel bearings)have to look at it some more

Check several things if these pool cleaners stop moving. Check the filter screen in the in-line filter and clean, if necessary. Clean the skimmer basket, pump basket, and pool filter. Check all of the hoses,
connections, and swivels for leaks that could cause loss of water pressure. Make sure that your wheel RPM is between 28 and 32. Adjust your thrust if necessary to get RPM to that level.

If you are sure that you have adequate pressure (main drain closed, no leakage, proper flow), it is probably your diaphragm. Check the diaphragm for damage or wear. If you see that there is damage or wear, replace the part. This should solve the problem with the pool cleaner.

- Stand behind the vacuum cleaner and look at the right-hand side wheel
- Remove the AI PIPE (it has two purple buttons that you push together to lift it up and out - it looks like a Tuba)
- Lay the handle down and look for a black button that will be exposed in front of the square hole
- Stick your index finger and middle finger into the vacant AI Pipe Hole (the square hole)
- Reach over with your thumb and press the black button in front of the square hole
- Whilst pushing the black button, lift your index finger and your middle finger and move the gray plastic piece up (lift the square hole basically)
- Remove your fingers from the square hole
- Lift the handle and stand your machine back upright again
- Place the AI Pipe back into the square hole

Jack up the front end and put stands under it and block rear wheels. Look at axle boots and see if they are cracked. Try turning wheel back and forth sharply and see if you can hear any clicking. Problem could be outer axle joints. If the boots are cracked or you hear a clicking noise you will have to replace the axle. The axle and boot come as a complete unit. Please let me know what you find out.

Test it by setting the rear end up just barely off the ground with some jack stands and setting the hubs to lock (if they are manual). Put it in 4 wheel and try to drive away. If the vehicle does not move then very carefully have a helper check and see if the front drive axles are spinning while it is in 4 wheel and in gear while running.
Spinning axles... hubs are at issue
No spinning axles... Transfer case issue.

USualy it is one or both of the front wheel bearings that have gone bad, while yo have the vehicle on a jack stand with the engine off and making sure that the wheels are set straight, hold the tire on top and bottom and try to move it if there is any movement felt you have bad wheel bearings.