Originally Posted by Avian
I am having similar problems. I dont have power to my vacuum pump to operate my HVAC louvers. No labels either on this panel. A red 12volt ACC switched supply has no voltage and is in a wiring harness that runs in the direct from the firewall towards this fuse panel. Have yet to fully trace it.
My yellow wire in your photo 15 amp fuse blows when I try another fuse. I heard a faint beep right before it happened. milliseconds elapsed. It looks like the yellow wire and the blue wire both 15 amp run together. Don't know where too. Nothing seems amiss at this point.
It's curious that my blue wire is protected by a relay rather than a fuse. Perhaps a prior owner got tired of replacing fuses. I don't know where either of these circuits go.
Your second from the right fuse has no wire to it. That's my fuse to the stair well cover and an under cabinet light that is switched from the panel be the entry. Does the 7370 have a stair well cover? If not, that may explain the lack of a wire on that fuse.
I haven't traced or otherwise identified any of the other circuits in this box, so I don't know if any of them go to the vacuum pump. You mentioned that a red wire at the pump enters a loom that comes out at this box, so maybe it's the wire to the upper right circuit breaker or the second wire from the left side. Good luck, and let us know how it goes.