The high-current fuses are coded as follows:
Fuse/Relay
Location
Fuse Amp
Rating
Protected Circuits
1 — PCM power relay
2 — Starter relay
3 — Blower motor relay
4 — Heated backlite relay
5 — Not used
6 — Trailer tow park lamp relay
7 — Not used
8 — Fuel pump
9 — Trailer tow battery charger
10 — Not used
11 30A** Power running board motors
12 — Not used
13 30A ** Starter relay
14 30A** Passenger power seats
15 — Not used
16 — Not used
17 30A** Trailer brake
2009 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)
Roadside Emergencies
316
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