FORD 2009 E-450 v.2 - Manual (Page 232)

If your vehicle is equipped with an auxiliary battery,
disconnecting the primary under-hood battery DOES NOT remove
power from all circuits.
If the battery has been disconnected and reconnected, refer to the
Battery section of the Maintenance and Specifications chapter.
The high-current fuses are coded as follows.
Fuse/Relay
Location
Fuse Amp
Rating
Protected Circuits
1 HC Micro Relay Powertrain Control Module (PCM)
2 HC Micro Relay Starter solenoid
3 HC Micro Relay Wiper
4 HC Micro Relay Trailer tow battery charge
5 HC Micro Relay Fuel pump
6 HC Micro Relay Trailer tow park lamp
7 HC Micro Relay Upfitter #4
8 HC Micro Relay Upfitter #3
9 HC Micro Relay Modified vehicle and stripped
chassis run/start
10 HC ISO IDM relay (Diesel engine only)
11 — Not used
12 40A** Modified vehicle and stripped
chassis run/start
2009 Econoline (eco)
Owners Guide, 2nd Printing
USA (fus)
Roadside Emergencies
232