I pulled all the fuses from the fuse box and put them back one by one. 4 of the fuses cause my multimeter to read 12V:

Fuse 26 (BATT MAIN 1 40A)
Fuse 27 (BATT MAIN 2 50A)
Fuse 30 (BATT MAIN 4 30A)
Fuse 16 (PCM/ETC 15A)