Battery always dying ***PLEASE HELP***

[rsyauto34]

I have an 02 chevy tahoe 4x4. The battery goes dead when I let it sit for 7 to 10 days without driving. I have had the alt checked and replaced the battery 4 times in the last 2 months. There are no lights that I can see on at night. My mechanic is lost...Any help???PLEASE Thanks in advance

[amac209]

find a mechanic who knows how to do a proper parasitic draw test. could be almost anything from glovebox/ashtray/hood light staying on to stuck relay or shorted wire, stuck switch or bad module. maybe give the dealer a try.

[glenncof]

I have same thing on my Porsche. 24mA going some place odd. This is like a 500 ohn resistor to ground.

Get volt/amp meter. One that can handle a few amps.

With everything off put it in series with battery and remove fuses one at a time until to current drops near zero. Then get out schematic and see what is attached. Move amp meter to replace fuse in circuit drawing the wierd currecnt. Isolate further.

[amac209]

as a general rule if you take the reserve capacity of your battery and divide it by 4 thats the number of miliamps you can have as a parasitic draw. most the modules will suck a little juice as will the stereo memory, clock, alarm system and maybe a few other things.

[kbopp]

I have had a bad switch in the visor mirror lights that killed mine once. I disconnected and have had no problems sence.

[alblogg]

Try checking your brake lite switch. It maybe opening up enough for a drain to be on battery to the EBS system but not opening up enough to light the brake lites.