Question about 2003 Ford Expedition
I need to know what the large wire coming of the battery goes to and why it would be pulling juice when the car is not running. It is draining the battery while it sits at night. The expo will keep a charge while driving and stopping during the day, but something is draining it at night. Any help is much appreciated
Large wire is possible hot wire to altenator. Should have B+ voltage at all times. Need to do an amperage draw test and start eliminating sub systems to determine root cause. Also would like to point out a new battery does not mean defective free. would load test to ensure no dead cells first.
Posted on Jan 10, 2013
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Posted on Jan 02, 2017
If you purchased an aftermarket altinater they can be bad. I have had bad ones before. Pull positive post off battery and keep it off for about 30 seconds to a minute. Reattach the cable and see what happens. This resets the computer. have the altinater checked but not at Schucks or the warehouse parts stores. Find a Napa as they seem to have the best testers and altinaters.
Posted on May 26, 2009
you will have to check the voltage whith the engine running .should be 13.6 or better
Posted on Sep 25, 2008
May I suggest that you drive your car to one of the major auto stores and they can and will check your alternator for you to make sure it is good/bad.These places like AutoZone do this all the time. They do not charge for the check out. (Of course they are hoping that if you need a part you will buy it from them.
One other suggestion. If you do need a new alternator, get a rebuilt one. It is cheaper and most always comes with a warranty.
Hope this helps Good luck Loringh PS please take a moment to give me a rating
Posted on Nov 09, 2008
SOURCE: Battery drain on 1990 Ford Tempo
HELLO CHARGE THE BATTERY UP AND START THE CAR AND PULL THE POSTIVE CABLE OFF THE BATTERY IF IT SAYS RUNNING YOUR ALTERNATOR IS WORKING BUT IF IT DIES THE ALTERNATOR NEEDS TO BE REPLACED
Posted on Mar 01, 2009
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