TBC Batt fuse is draining battery after car set 24 hrs what is this fuse for

bad batt..alternator..or wornwire that charges. Chec all connections for dirt and titeness. Cud b a fuse tu. Charginwire is at back of alt to the batt

Yes Steve I do , that fuse supply's power to the I/P fuse block inside the vehicle . It powers AUX/PWR fuse #13 -20amp , RDO/BATT fuse #19 - 15amp ,MIR/LKS fuse #7 - 5amp , CTSY/LP fuse #8 - 15 amp , CIGAR/LTR fuse #2 15 amp , PWR/LKS fuse #14 15 amp , HDLP/SW fuse #1 - 10amp .Do you know where the I/P fuse block is ? You would need to do a parasitic draw test ! This involves hooking up a amp meter in series with the negative battery post an negative battery cable . Pulling each one of these fuses till the battery draw stops ! How To Perform Parasitic Draw Test EricTheCarGuy check out Eric the car guy's video on the subject !

Stuck relay? Feel the tops of all relays with key off to see if one is warm.

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.

unhook hot wire to alt at night if batt is up the next morning it is the alt

Find the battery drain. Disconnect negative cable from battery. Place test light between pattery negative post and disconnected negative cable. If light is bright while no accessories are on, there is a drain. While keeping the test light in this configuration, pull each fuse out and replace on at a time while watching test light. If the light dims or goes out when a particular fuse is out, that identifies which circuit has the drain. Use that information to track down what is on or draining.

Whats TBC?

FIRST CHECK TO SEE IF YOUR BATTERY CAN ATTAIN & SUSTAIN A FULL CHARGE FOR 24 HRS, IF NOT REPLACE BATTERY. IF OK, DISCONNECT POS TERMINAL, HOOK UP VOLT METER SEE IF YOU HAVE MORE THAN 8 VOLT DRAW IN THE SYSTEM, IF SO START PULLING FUSES TO LOCATE EXSESSIVE DRAW ON BATTERY.

incorrectly wired radio would cause problem.it would be the wire that is suppose to connect for dimming lights looks like a ground but is not has a yellow or a white stripe with black on it.use it as a ground and it will blow the fuse.