Battery discharges in 3 weeks (1 Viewer)

[NCYooper]

Not sure if this is normal or not. If I leave the LC in the garage for three or four weeks with the doors locked (or unlocked - I've tried both), the battery (only six months old) keeps discharging completely. Does the security system draw THAT much power, or should I start looking for some other source of the battery drain? I recharged the battery the first time it happened and drove to AutoZone to double check the battery and was told it was still perfect.

 

[mobi-arc]

If you remove the battery negative cable from the negative post, and place a test light between the floating ground cable and ground post, as a quick general rule of thumb, if enough power is being drawn to illuminate the test bulb, then you have a parasitic draw that requires attention. You could also use a multimeter in place of the test light to see exactly what the current draw is.

 

[NCYooper]

Thanks. I'll borrow a multi-meter from work tomorrow night.

 

[Copenhagen1]

While testing you need to make sure all doors are shut and if there is a pin switch for the hood make sure it is pressed in (closed).

If you do have a reading on the meter, you have to start pulling fuses and replacing them until you narrow it down to which circuit has the 'leak'.

 

[Skidoo]

How much current is normal, as the security system takes a little?

 

[spressomon]

Do have an amp(s) not powered via ignition key possibly?

 

[lhommec13]

I had this same problem, except my battery would discharge after only a few days of sitting. I have lots of aftermarket electronics installed so that's where I started with the test light and multimeter. Turns out the culprit was an incorrectly hooked up relay for my NAV-TV unit that never turned off. If you have any aftermarket electronics installed, start there first.