2001 xg300 had lots of rain that i drove through, all of a sudden the battery light came on, runs for a bit then dies , boost dont seem to help, also the belt squeeks with or without the ac on

Hey Tom if its rain, look to see if moisture is affecting wires a spray of WD-40 in and around electrical could really help and wont hurt any thing WD stands for =water dispersant.

Sounds like alternator/generator could be bad and also battery could be bad.

I would start by checking main fuses under the hood. water could have cause a short also check battery cables to see if they are heavy enough to carry the amp load needed to start the car. factory cables are not heavy enough after a few years.

replace battery

how old is the battery get it checked and make sure the connections at the the battery and the terminal on the stsrter pos. post are tight. find the grd term on the engine and make sure every thing is good and tight

What kind of SPECIAL pieces did he say? One might need a special tool or two to remove and replace the alternator, but I know of NO special PIECES.

You need someone to boost you with jumper cables.Battery will be fine after you let the car run for a bit.The alternator will recharge your battery.

Check the wires to the battery and make sure they're not corroded and in good shape. Take them off the post and clean the inside so that they make good contact with the battery post. If they're not making a good connection and you start using a lot more power like when using AC they will get really hot and may burn up.

once the car is started it runs off the alternator .. so even if your battery is bad the alternator will still run the car .. so it looks lilke your alternator is bad .. when you jumped the car you charged the battery a little but not enough to keep it going since the alternator is not charging . if you hook up a charger overnight then you might be able to run it long enough to get somewhere (garage) .. try to drive when you dont need lights .. those will run down the battery in a short time .. if you have a volt meter then the battery should read about 13.8 to 14.2 volts when the alternator is working properly (car running) .. if it reads lower (like 12volts or less) then the alternator is not charging .. some auto parts stores will test your system free ..

The new sealed batteries fail without any warning, drive to the store, come back out the battery is dead, the other issues you have are caused by low system voltage, replace the battery and all should be well.