Re install the ecu and backup fuses. Then locate the sub circuits and pull each fuse and note the change.

Backup Acc Causing Battery Draw Overnight Acurazine
Honda accord backup fuse. Remove the back up and ecu fuses. 75a fuse labeled back up 15a fuse labeled ecu once you pull these two fuses wait about 10 minutes before re installing them. Instead with a fuse puller or needle nose pliers pull the following two fuses from the fuse box. You need to put an amp meter in place of the fuse to get a current reading. This should give you some clue as to which circuit has the problem. I have been able to troubleshoot it down fuse 7 backup by the drivers foot however i am running out of ideas for what components to check on that fuse.
Honda accord 2011 2012 fuse box diagram year of production. Step 3 re install fuses and test. Mobil 1 5w 20 with honda oil filter 15400 plm a01 or 15400 plm a02 shell or other top tier gas honda care 6yr120k from bernardi honda weathertech floorliner 1st 2nd 3rd row. The interior fuse box is on the drivers lower left side. 2007 fuse block engine compartment number ampere rating a circuits protected 1 10 left headlight low 2 30 rear defroster coil1 3 10 left headlight hi 4 15 small light 5 10 right headlight hi 6 10 right headlight low 7 75 back up 8. Honda accord 2007 fuse box diagram year of production.
2011 2012 engine compartment number ampere rating a circuits protected 1 11 100 battery 1 12 100 battery 1 2 40 passengers side fuse box 2 1 not used 2 2 40 absvsa 2 3 30 absvsa motor 2 4 40 passengers side fuse box 2 5 not used. To remove the fuse box lid pull it toward you and take it out of its hinges. Fuse box diagram location and assignment of electrical fuses for honda accord 2003 2004 2005 2006 2007. That 40a fuse youre checking from is a major bus feed with many sub circuits. Fuses in the vehicle passenger compartment honda accord 2003 2008.