My wife’s Freestar starts every day, but if left unused for a day the battery is dead.
I checked the battery…only a year old, and I get 12.8 volts with the ignition off and, 14.4 volts with the engine running.
Yesterday I spent three hours trying to track down what circuit was using the extra power.
I made sure nothing was plugged into the lighter plug, the keys were out and the doors were shut with all courtesy lights out.
There is no glove box lamp, or under hood lamp and shutting off the lights in the shop I couldn’t see any thing lit up.
I listened with a stethoscope to be sure that the CD player was not running the motor and listened to the overhead (factory installed)DVD player in the ceiling. Couldn’t hear a thing. I also made sure no disc was in the CD or the DVD players.
There are no heated seats or steering wheel. No aftermarket lights or other items have ever been added to this car so it is not something that someone connected without going through the factory fuses.
The only lamp on was the Security light on the top of the dash that has always flashed red once every second or so.
I connected my DVM to the negative battery post and the other lead to the negative battery cable.
Set my DVM to 10 amps and pulled every fuse, & relay one at a time.
with the courtesy lights (2 overhead map lights. two floor lamps and two behind the front seats) on it draws 3.26 amps
After the courtesy lights power down (25 seconds) it draws .40 amps
After 45 second delay the draw drops to .18 amps
Every fuse and relay showed the same .18 amps after the modules powered down.
I checked every fuse and relay in the power distribution box, under the hood and then all the ones under the dash.
The only oddball was a #58 under the hood. When I closed the door it dropped to 1.1 amps then down to the .18 amps.
I looked up the fuse data in the owners manual, it reads "SJB #1 -Center high-mount Stop Lamp (CHMSL), License plate lamps, OBDII,
Dome lamp, Auxiliary blend doors, Switch illumination (feeds F-8, F-9, F-10,and F-11)
That could have powered some courtesy lamps. That could be the drop to 1.1 amps instead of the 3.26.
This seemed still too high and when I checked my Dakota today it only draws 1.26 amps and .03 amps. after the courtesy lamps power down.
The Freestar has a security system and the Dakota does not, But I cannot imagine a security system drawing (1.5 amps) that much more.
Another question for my curiosity is, what controls the dome lights as the older cars had the momentary switch in the door post. What controls that switching with the newer vehicles. I could find no switch and for each fuse under the dash that I pulled, I had to close the door and wait the 1.5 minutes for that system to power down, read the meter and open the door to go to the re-install that fuse and go to the next fuse.
Any ideas would be appreciated.