The fuse of 307 electronic booster pump is located in mf8. It is 70 amps. The fuses connected to it are 30 and 80. Of course, if connected to this booster pump, this fuse is not energized. The fuse box needs to be disassembled, which is usually caused by virtual connection inside the fuse box. I hope I can help you. I hope you have a good trip.