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
—
Not used
11
—
Not used
12
40A**
Modified vehicle and stripped
chassis run/start
13
30A**
Starter solenoid relay
14
40A**
Run start relay
15
40A**
Modified vehicle and stripped
chassis battery
16
50A**
Auxiliary A/C blower
Roadside Emergencies
223
2011 Econoline
(eco)
Owners Guide, 3rd Printing
USA
(fus)