Corsair Battery Gobbler

[cekkk]

My 2020 is on its third battery since I bought it with one year and 9000 miles on it. About one year ago I went out to start it and the battery was dead as in zero and would not take a charge. Lincoln brought it in and installed a new battery under warranty. Then less than 2 months ago, The same thing. Now it was out of warranty so I had a new interstate battery installed in it. That battery only lasted a month. Out of warranty on these last two batteries. So this time my shop reset the computers, some such language. They are well thought of in town and I trust them. At 300 bucks a pop plus installation I would prefer not to do this on them monthly basis. Has anyone else experienced such a problem or does anyone have any suggestions as to the cause?  Thx.

[ColonelColt]

You must have an open circuit that's draining the battery.  Modern cars are so electronics laden that sitting for a month will drain the battery but that should be rechargeable.  Your problem is something different.  

 

There could be a fault in the alternator that's draining and killing the battery...possibly some other circuit.  I know it's a pain to do but you might try disconnecting the battery when the car is not in use and see whether the problem goes away...that at least will eliminate the battery as part of the issue.  Another way is to use a test light or multi-tester and pull one fuse at a time and see whether the test light stays on or goes off or the multi-tester shows a drop in current.  That can narrow it down to a specific circuit.  

 

A good tech should be able to test the system and determine what circuit is remaining open and go from there.  It could be as simple as a worn wire going to ground.  I don't know what kind of insulation Ford uses in their vehicles but my next door neighbors have a GM car that used organic based wire insulation and rabbits got to it and ate the insulation away and caused all kinds of havoc in the car's electrical system.  They had to replace the wiring harness to fix the car.  My wife had a Ford Fusion Energy plug-in hybrid and rabbits ate through the charging cord and I had to buy a new charger for it.