2008 FORD F150 relay

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
F33 15A* Shift solenoid, CMS #12 and #22,
Ignition coils
F34 15A* PCM power, IMRC (4.2L)
F35 20A* Instrument cluster high beam
indicator, High beam headlamps,
DRL disable relay
F36 10A* Trailer tow right turn/stop lamps
37 20A* Rear power point
38 25A* Subwoofer power
39 — Not used
40 20A* Low beam headlamps, DRL
41 — Not used
42 10A* Trailer tow left turn/stop lamps
F101 30A** Starter solenoid
F102 20A** Ignition switch feed
F103 20A** ABS valves
F104 — Not used
F105 30A** Electric trailer brakes
F106 30A** Trailer tow battery charge
F107 30A** Power door locks (BSM)
F108 30A** Passenger power seat
F109 30A** Driver power seat, Adjustable
pedals, Memory module (pedals,
seats)
F110 20A** Cigar lighter, Diagnostic connector
power
F111 30A** 4x4 motor relays
F112 40A** ABS pump power
F113 30A** Wipers and washer pump
F114 40A** Heated backlite, Heated mirror
power
F115 20A** Moonroof
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
304

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
F116 30A** Blower motor
F117 20A** Instrument panel power point
F118 30A** Heated seats
401 30A Circuit
breakerDelayed 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
boardTrailer tow backup lamps
R302 — Not used
R303 Printed circuit
boardFuel pump
R304 Printed circuit
boardBattery saver
R305 Printed circuit
boardHorn
* Mini fuses ** Cartridge fuses
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
305

Auxiliary relay box
The relay box is located in the engine compartment on the left fender.
•With Daytime Running Lamp (DRL) or 4x4 options
•Without Daytime Running Lamp (DRL) and 4x4 options
The relays are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingDescription
F03 5A Clockspring illumination
R01 Full ISO Relay 4x4 CCW
R02 Full ISO Relay 4x4 CW
R03
1⁄2ISO Relay Daytime Running Lamps (DRL) high
beam disable
R201 Relay DRL
R202 Relay A/C clutch
D01 Diode A/C clutch
D02 Diode One Touch Integrated Start (OTIS)
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
306

heated ......................................114
programmable memory ..........149
side view mirrors (power) .....112
signal .......................................114
Moon roof ..................................119
Motorcraft parts ........338, 357, 380
N
Navigation system .......................80
O
Octane rating ............................363
Oil (see Engine oil) ..................345
P
Parking brake ............................266
Parts (see Motorcraft parts) ....380
Passenger Occupant
Classification Sensor .................165
Power distribution box
(see Fuses) ...............................300
Power door locks ......................144
Power mirrors ...........................112
Power point ...............................108
Power steering ..........................267
fluid, checking and adding ....370
fluid, refill capacity ................381
fluid, specifications .................381
Power Windows .........................110
Preparing to drive your
vehicle ........................................268
R
Radio ..........................23, 27, 29, 36Rear seat entertainment
system ..........................................51
Rear video camera ....................280
Relays ........................................299
Remote entry system ...............147
illuminated entry ....................151
locking/unlocking
doors ................................147–148
panic alarm .............................149
replacement/additional
transmitters .............................150
replacing the batteries ...........149
Reverse sensing system ...........277
Roadside assistance ..................296
S
Safety Belt Maintenance ..........183
Safety belts (see
Safety restraints) .............164, 167,
169–170, 173–175, 177
Safety defects,
reporting ............................327–328
Safety restraints ...............164, 167,
169–170, 173–175, 177
Belt-Minder...........................178
Belt-Minder,
deactivating/activating ...........181
extension assembly ................182
for adults .........169–170, 173–175
for children .............................192
lap belt ....................................172
Occupant Classification
Sensor ......................................165
safety belt maintenance .........183
warning light and
chime ...............................177–178
Safety seats for children ..........196
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Index
395