My 99 saturn sl drains the battery and the heater fan and ac won't work. I got a new battery and it drained it and won't take a charge again. can anyone help? chuck

Bad heater core.Yes i know you said ac but your heater core is bad.

You may need a resister for the heater fan motor.

You mean with the engine running? If the engine is running, the heater fan should be getting power from the alternator, not the battery. Does your battery light go off after engine is running? Or does the voltage gauge show normal charging when running?
If you can start the truck, have your charging system checked out. If it won't start now, have the battery charged up and try again. Then have the charging system checked. If it is good, your heater fan may have a short and drawing too much current, But a heater fan will run the battery down pretty quick, if the engine is not running.

Hi Vernon, There could be a number of different reasons why your vehicle is failing to start. The battery voltage could be dropping during start and become unable to engage the starter motor to turn the engine. You can check this by trying the key with the head lights switched on. If the lights become very dim, you'll need to check the battery, meaning clean the terminals and then try to start with a jump from another battery. If you achieve start up and it fails again the following morning, you will probably need to replace the battery. There could be a problem with the starter relay or a loose contact for the starter motor, most lik3ely the one connecting to the soliniod. It would be good to know some additional information, such as does a clicking sound come from the starter when engaged? Is there a perceptible drop in voltage output when the starter is engaged? does the enine turn at all? Try what I've suggested and if that does not solve the problem answer the questions and let me know anything else which you may think is relevant. Regards John

well the battery could be refusing to take much of a charge, the alternator might not be putting out enough to keep the car running and charge the battery. or there could be something draining the battery, even with the ignition in off position. you can take the battery and alternator into advance or autozone for a test, but the drain problem is going to take some trouble shooting. things which are on even when off can be the remote door locks, remote starter, lights in the glove box and trunk. if you have aftermarket stuff like custom radios, GPS, etc. are usually put in by someone who does not know what they are doing so i would start there.

When the car is running check the voltage at the battery. You should see 14 volts. If you see around 12 volts or less the alternator is not charging.

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auto door lock systems are great for draining batteries while the car sits. so are trunk, glove box, and other interior lights. someone is going to have to figure what is draining the battery while the car is off by troubleshooting it and eliminating things.

if you have an autozone,they will put it on the computer for free.if you don't,call around some parts stores and see if they will.you should change the belt instead of shortening it.sounds like the alternator though.have a shop check the tensioner too.

Did you check the alternator? if it is faulty the car will drain all the power from the battery until it goes flat

Sounds like your heater core is mostly stopped up. You need to have your cooling system back flushed and cleaned.