I'm having the same problem on my 95 Bronco as backhoeken. I didn't want to steal his thread so I decided to start a new one. The battery turns up dead after 5-6 days. Went to Autozone and they tested the battery and alternater and everything tested OK, except that the battery was low.

I seem to have traced the drain to fuse #8. With the doors closed and hood bulb out, I measured 127mA drain from the battery. I traced most of the drain fuse #8 which was pulling 116 mA. To confirm, I checked the drain from the battery with #8 out and got 11.4 mA.

Fuse #8 covers all interior lights, outside mirrors, clock/radio memory, speedometer, warning buzzer, left and right door switchs, the engine compartment light and as I discovered, the remote keyless entry system.

I noticed that there was some sort of relay in the keyless entry system as I was pulling #8 fuse. You can hear the relay clicking on and off as voltage was applied.

When I pulled the connection to the keyless entry module, the current accross #8 fuse dropped to 56 mA.

Do any of these numbers sound normal or do all seem out of line? If there is a problem with the keyless entry, is this only 1/2 of my problem?

The other thing I thought was interesting is that the drain seems to increase with time. In 5 minutes, the drain at the battery went from 127 mA to 145 mA. Could this be some indication of the source?

Thanks

 

I did a little research. I have been wondering about the ma numbers myself.

They say the max parasitic current draw most cars ever have is 30ma. Typical current draw is 7-12ma.

What I didn't know that even with these low draws, the battery can still be run down by just sitting in a very short time. Depending on the condition of the battery, it can be as short as 15 days, but typical is 20-30 days, before the battery goes low enough before it won't start the vehicle. They are recommending dealers disconnect the battery - cable if the car is going to be sitting for more than 20 days.