I have a 96 sable i change the alternater and the battery twice and when it sit for more then a day the battery dies

you've had the misfortune of getting a bad rebuilt alternator-sorry-they should give you another one -I hope its not hard to replace-Denny

If you used a new or rebuild alternator, I'd suspect that the harness from the alternator to the battery is open circuit. It happens with age and corrosion. Measure the alternator terminal voltage, engine running. Should be about 13.7v. Same voltage should appear on the battery + terminal. If not, make up a heavy duty temp cable and run it from the alt to the battery.

try and jump start it

usually if a battery light is on it is a sign that the alternator has went out, start it and take the negative battery cable off while its running, if it dies the alternator is bad.. as far as the radio, that has nothing to do with it, most likely a fuse blown.

THE SUN GEAR SHELL IS BROKEN IN THE TRANS HAS NOTHING TO DO WITH BATTERY OR ANYTHING ELSE

ITS EITHER ALTERNATOR OR ALTERNATOR WIRES BROKEN OR DAMAGED.IF ALTERNATOR WIRES LOOKS OKAY.I WOULD REPLACE ALTERNATOR AND BATTERY CABLES.WHEN BATTERY LIGHT COMES ON ALTERNATOR IS NOT CHARGING BATTERY.REPLACING BATTERY TWICE A YEAR IS CHARGING PROBLEM.ALTERNATOR NOT DOING ITS JOB.IF YOU BUY ANOTHER ALTERNATOR BUY CORRECT AMP ALTERNATOR BUY WHAT FACTORY PUT IN.

your alternater could be bad and not charging the battery, get it cranked then remove a battery cable. If it stays running, alternater is good if it dies alternater is bad

I have had the exact problem. I've changed altenator 3 times also and it has the same leak, but I've changed altenator an batterys over 2 year span. It just happend to me today after not driving it for 5 months. It's been in storage while I was away. Drive it fine for 2 days but today the radio kept shutting off and finally the car died right in the middle of the road. Bought a new battery because I had a warranty on last battery, but bought it just to get it home and in the driveway. Did you ever find out what was wrong with it?

You might want to start by replacing the crank sensor first.

It sounds to me like a faulty battery.  I bought a battery from Napa for my 92 Sable.  Did the same thing...ran all day..then it would die.  Come to find out the battery was junk.  Replaced that battery and I was good to go.  Other than that, I would make sure allt he cable are tight and have the alternator tested.