MY Mercury Grand Marques 2001 with 45000 mi. has electrical problems that are draining the battery

The LCM is still under extended warranty on these cars. There has been lots of problems with them so Ford had to extend the warranty. Take it to a Ford dealer.

A bad LCM (lots of them go bad) won't necessilarly drain the battery. That could be an additional problem. Remove the possitive batt. cable and see if there is a current drain with a multimeter. When you take it in for the LCM, maybe they can find it.

I have a 2001 GM LS that I purch. in 2004. It was fine for a year or so and then elec. problems started. Several new batteries, then all kinds of problems, even as I write: trunk opening on I- state, dash panel gets so hot, doors sometimes will not lock, check engine light on-on computer, goes off for a day, then back on. In reverse, trunk opening (had to disconnect), And on and on! Battery now dead as I tried to leave for errands and a week ago (battery dead) AAA wanted $157. to replace it! WHAT TO DO? I am 76 yr old female & can not afford to trade up.....

Wow, that's a bucket full of problems. That's an awful lot for a battery, go to an auto store. You might have a wiring harness problem somewhere, but what a tough one to find. I'd trade it in, even if I had to go down. Maybe someone else will have an idea. I don't know a lot about GM