Fuse/Relay
Location
Fuse Amp
Rating
Passenger Compartment Fuse
Panel Description
F116
30A**
Blower motor
F117
20A**
Instrument panel power point
F118
30A**
Heated seats
401
30A Circuit
breaker
Delayed accessory power: Power
windows, Power sliding backlite
R01
Full ISO relay
Starter solenoid
R02
Full ISO relay
Accessory delay
R03
Full ISO relay
Hi-beam headlamps
R04
Full ISO relay
Heated backlite
R05
Full ISO relay
Trailer tow battery charge
R06
Full ISO relay
Blower motor
R201
Half ISO relay
Trailer tow park lamps
R202
Half ISO relay
Fog lamps
R203
Half ISO relay
PCM
R301
Printed circuit
board
Trailer tow backup lamps
R302
—
Not used
R303
Printed circuit
board
Fuel pump
R304
Printed circuit
board
Battery saver
R305
Printed circuit
board
Horn
* Mini fuses ** Cartridge fuses
2008 F-150
(f12)
Owners Guide (post-2002-fmt)
USA
(fus)
Roadside Emergencies
305