In a '94 explorer why does the battery die even after replaced with a new battery?

Answer 1

first off you need to find out where the draw is, a easy way is to take your negative battery cable off (works on eather side) get test light and hook one end to the end of the battery cable and the other end to the battery terminal, now unplug your hoolight, take your key out of the ignotion, turn all power off in vehicle and shut all doors, if the test lite is lit up any there is a draw that is draining you batter, now get to your fuse panel and pull fuses one by one till the light shuts off, whatever fuse you pulled to shut off the light is your problem area, now make sure after you pull the fuse that you close the door, if you have the door open it will light up the test light. One reason could be that your Alternator needs to be replaced. Some simple checks can be performed to see if the source of the battery draining is the alternator or some device that is remaining on after the ignition switch is turned off. First, have the battery recharged. Jump starting a completely dead battery may damage a good alternator by causing unusually high voltage output. Start the vehicle with the recharged battery and place a voltmeter across the battery terminals. When the car is started, the voltmeter will drop momentarily and then should read about 13.5-14.0 volts indicating the alternator is working.