2007, Mercury Milan battery keeps draining =, car will not start, I have had the battery charged and checked, the alternator its fine. terminals a good and clean any ideas what might be draining the battery?

The voltage regulator is built into the alternator. If the wires in the alternator connector are good, the problem is in the alternator. Take it back to the shop.

Check if the alternator is charging, Connect a volt meter to the battery and rev the engine a little above idling (about 2000 rpm) if the voltage changes to above 12.5 volts, it's ok. If this is the case, it means your battery is not able to charge anymore and will have to be replaced. If the voltage does not rise, you need to have the alternator checked.

i would say pcm.these. are notorious for getting spiked from ignition sys.have ya had any perfomance problems in the past?

The check charging light should be on if the engine is not running.
The most common cause is a bad chip in the key. Have you tried a spare key ?

check voltage from battery car running. if alternator good it will produce 13.6-14.2 volts. if lower replace alternator. good-day ! make sure battery posts and wires are clean and tight.

no there is not a recall on your milan, only on the monterey for after market fuel filters. The fact of the matter is they just don't build them like they used to. So Its probably your alternator thats the number one probable cause.. hope this helps and god bless.

Was the new battery charged? If the new battery worked for a few days it is possible the alternator is bad and it is not charging the new battery. Start the vehicle and measure the voltage at the battery, it should be somewhere between 14 and 14.5 volts with the engine running. If less than 12.5 volts I would suspect the alternator and remove it and have it tested at a local parts store, This is usually a free service. Also could be a wiring problem or dirty battery cables.

A 2007 Milan might be still under warranty if it has less than 36,000 miles on it. If under 36,000 miles take it to the dealer for possible warranty repair.

Hope this helps.

Bob

Bob

Did it blow a fuse for the alternator. What is the battery voltage when it's running?

Remove the lugs at the battery. Clean the posts and the lugs - then reconnect. Your battery won't charge (and the jumpers won't work) largely because of a film on the + post and lug. If you live in a hot summer area, (Arizona) the problem is especially troublesome.

Yes....take your battery in for testing....and if you can, take the alternator as well. It is one or the other.