Dead Battery

[doncorleone77]

Something keeps killing my battery, all while the car is turned off and sitting in my garage. I had my battery charged, hooked it back up jumped in the next morning to go to work & I've got a dead battery.
I've noticed that lately my headlight switch has been acting funny, it's in the off position but my parking lights will still be on sometimes. If I stick the key in off they go. Can this switch be the source of my problems?

 

[mharrison]

Simple:
Pull the fuse for the headlights overnight and see if it will start in the morning.

More Involved:
Or if that doesn't yield results......
Put a an ammeter or multi-testor between the positive battery cable and the positive post of the battery set on amps. Disable the trunk light. (Since the trunk will be open for you to read the meter.

You should see <50 milli-amps being pulled at rest with nothing on.(This was for my BMW, but the Lincoln shouln't have a big draw.) I've heard it can take as much as 15 for the LS minutes to go into rest mode.

If you see more, pull fuses one a time until it drops. This isolates your circuit. Then whip out the trusty wiring diagram and determine what that fuse feeds. You can unplug components on that circuit one at a time.

Mine was a bad sub amp in my BMW. The antennae base was leaking water on it and shorted it such that it was on all the time.

If you are pulling <50 mili-amps at rest......Drive the car every once and while. The LS was built to be driven!!!!