No information generic answer https://www.wikihow.com/Find-a-Parasitic-Battery-Drain
The backup fuse is the external fuse that you supply. ... Choose one to suit - perhaps to match fuse or circuit breakers in the rest of you control panel.
https://electronics.stackexchange.com/questions/253271/what-exactly-backup-fuses-are
SOURCE: Parasitic draw on a 97 Mercedes E300D
hello,rear fuse number 3 is 15 amperes with consumer ,,central locking,radio,and cd changer,,ref.owner" manual, ,,if you want a fuse designation ask your dealer,ty
SOURCE: ''Maxi 1'' fuse on 1998 Ford Taurus?
Try everything to see what does not work,with the fuse out
SOURCE: Parasitic battery drain
A stuck relay will do this.
Testimonial: "Thanks for your help Daniel. I'll give that a try next."
SOURCE: BFC BATT FUSE 10 AMP
Maybe shouldn't answer and wait for someone to tell us both what BFC means, but it would not be for the BCM. Sounds like what some cars call the IOD fuse-ignition off draw-the small battery draw that is used for the computer memory, radio pre-sets, and the clock, theft alert system. Believe it would be about that same draw as yours, not enough to drain a battery. Still have your owner's manual? It should have a listing of the fuses.
Testimonial: "No it is not for the pcm, i got my answer from the wiring diagram that i found. Its a positive voltage to the BCM, so thats mean all the think that keep in power when the ignition is off. Clock, int, light, trunk ect. And i read a comment about my drain on justanswer.com and it say that u need to wait 15 to 30 min before the car go to sleep mode. So i waited like 15 min and my 0.06 AMP drain shutted down to 0.02. So thats mean its a nowmal draw and that mean to that all of you guys have to be careful on how to read a parasit draw battery."
SOURCE: xg300 parasitic draw, located the 2 fuses that have the draw on them, how do i fix it
parasitic draw should remain at 50 milli amps or less or .05 amps this needs to be checked with an amp meter with the battery terminal disconnected and the power drain going through the amp meter keep in mind the circuits your testing may take up to an hour or two to fully go to sleep there is no easy way to test these multi circuits it takes years experience to troubleshoot these
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