Bad LCM and battery?

Unless a relay is hanging that's allowing some of the lights to stay on I doubt it, but with things electrical almost anything could be possible... Any leakage(short) inside the module that discharges the battery in a few hours without lights on, would likely cause over heating(smoke)...
 
Drove car home from shop yesterday after they put on a new serpentine belt and belt tensioner pulley. It was parked for 45 minutes, lights off. Wouldn't start when I went back out. It's been cranking weak before, and the battery had been dead a couple weeks ago because the car was not driven. But I thought all that was behind me.

This is a great ad for a sale, huh?
 
sounds like the alternator, and all your electrical/battery connections, and grounds would be worth checking.
 
If you have a volt meter you can check the battery voltage with the engine running, lights and accessories on, if voltage isn't at least 13v(should be 14) you defiantly have a charge prob...Guessing you'll measure battery voltage that will be 12v or less depending on state of charge...

Of course you could just check the volt meter on the console, if it isn't above 12v you have a problem...
 
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Started car with fully charged battery, drove right to my mechanic (not the dealer guy) who put on the volt meter while engine was running.

Said the alternator was fine (can that be determined just by using the volt meter while the engine's running?)

I turned off the car and the charge fell to 11V. Dropped to 7 when I started it up again.

Mechanic said it was all about the battery.

I took the battery back to Auto Zone and the guy just gave me another brand new one which I immediately installed.

Drove the Mustang to work...

We'll see if the MM starts again next time.
 
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