PATS light is in the clock or in the dash under the center vents, the red led that blinks all the time when you leave the car, take the keys. You might just have a weak battery, try recharging it first, and check the connections at the battery posts. I've had a few batteries go bad like that, lights on, no crank, even with charging it up. If you get the car running, check voltage at battery terminals, 14 volt range means the alternator is OK.