2012 FORD SUPER DUTY heater

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
31 5A Trailer brake controller (brake
signal), Customer access
32 15A Moon roof, Auto dimming mirrors,
Power invertor, Driver and
passenger door lock switch
illumination
33 10A Restraint control module
34 10A Not used (spare)
35 5A Select shift switch, Reverse park
aid module, Trailer brake control
module
36 10A Fuel tank select switch
37 10A PTC heater
38 10A Radio faceplate
39 15A High beam headlamps
40 10A Parking lamps (in mirrors), Roof
marker lamps
41 7.5A Passenger airbag deactivation
indicator
42 5A Not used (spare)
43 10A Wiper relay
44 10A Upfitter switches
45 5A Not used (spare)
46 10A Climate control
47 15A Fog lamps, Fog lamp indicator (in
switch)
48 30A Circuit
BreakerPower windows switch, Power
rear sliding window switch
49 Relay Delayed accessory
Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle’s main electrical systems from overloads.
Roadside Emergencies
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USA(fus)

WARNING:Always disconnect the battery before servicing high
current fuses.
WARNING:To reduce risk of electrical shock, always replace
the cover to the power distribution box before reconnecting the
battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and Specificationschapter.
The high-current fuses are coded as follows:
Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
1 Relay Blower motor
2 — Not used
3 Relay Urea heaters (diesel engine)
4 — Not used
5 Relay Rear window defroster
6 — Not used
7 50A* Rear window defroster
8 30A* Passenger seat
9 30A* Driver seat
10 — Not used
11 — Not used
12 30A* Driver smart window
13 — Not used
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USA(fus)

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
14 — Not used
15 Diode Fuel pump (diesel engine)
16 — Not used
17 15A** Heated mirror
18 — Not used
19 — Not used
20 — Not used
21 — Not used
22 30A* Trailer tow electric brake
23 40A* Blower motor
24 — Not used
25 30A* Wipers
26 30A* Trailer tow park lamps
27 25A* Urea heaters (diesel engine)
28 — Buss bar
29 Relay Trailer tow park lamps
30 Relay A/C clutch
31 Relay Wipers
32 — Not used
33 15A** Vehicle power (VPWR) 1
34 15A** VPWR 2 (diesel engine)
20A** VPWR 2 (gas engine)
35 10A** VPWR 3
36 15A** VPWR 4 (diesel engine)
20A** VPWR 4 (gas engine)
37 10A** VPWR 5 (diesel engine)
38 Relay Powertrain control module
(PCM) (diesel engine),
Electronic control module (ECM)
(gas engine)
39 10A** 4x4 hub lock
Roadside Emergencies
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Owners Guide, 1st Printing
USA(fus)

Do not attempt to push-start your automatic transmission
vehicle. Automatic transmissions do not have push-start
capability. Attempting to push-start a vehicle with an automatic
transmission may cause transmission damage.
Preparing your vehicle
When the battery is disconnected or a new battery is installed, the
automatic transmission must relearn its shift strategy. As a result, the
transmission may have firm and/or soft shifts. This operation is
considered normal and will not affect function or durability of the
transmission. Over time, the adaptive learning process will fully update
transmission operation.
1.Use only a 12–volt supply to start your vehicle.
2. Do not disconnect the battery of the disabled vehicle as this could
damage the vehicle’s electrical system.
3. Park the booster vehicle close to the hood of the disabled vehicle
making sure the two vehiclesdo nottouch. Set the parking brake on
both vehicles and stay clear of the engine cooling fan and other moving
parts.
4. Check all battery terminals and remove any excessive corrosion before
you attach the battery cables. Ensure that vent caps are tight and level.
5. Turn the heater fan on in both vehicles to protect from any electrical
surges. Turn all other accessories off.
Connecting the jumper cables
Note:In the illustration, the vehicle on the bottom is used to designate
the assisting (boosting) battery.
Roadside Emergencies
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Check every six months
Battery connections; clean if necessary
Body and door drain holes for obstructions; clean if necessary
Cooling system fluid level and coolant strength
Door weatherstrips for wear; lubricate if necessary
Hinges/latches/outside locks for proper operation; lubricate if necessary
Parking brake for proper operation
Safety belts and seat latches for wear and function
Safety warning lamps (brake, ABS, airbag, safety belt) for operation
Washer spray/wiper operation; clean or replace blades as necessary
Multi-point inspection
In order to keep your vehicle running right, it is important to have the
systems on your vehicle checked regularly. This can help identify
potential issues and prevent major problems. Ford Motor Company
recommends the following multi-point inspection be performed at every
scheduled maintenance interval to help ensure your vehicle keeps
running great.
Multi-point inspection – Recommended each visit
Accessory drive belt(s) Half-shaft dust boots (if equipped)
Battery performance Horn operation
Clutch operation (if equipped) Radiator, cooler, heater and A/C hoses
Engine air filter Suspension component for leaks or
damage
Exhaust system Steering and linkage
Exterior lamps and hazard
warning system operationTires for wear and proper pressure,
including spare
Fluid levels*; fill if necessary Windshield for cracks, chips or pits
For oil and fluid leaks Washer spray and wiper operation
*Brake, coolant recovery reservoir, manual and automatic transmission
(with an underhood dipstick), power steering (if equipped) and
window washer
Be sure to ask your dealership service advisor or technician about the
multi-point vehicle inspection. It’s a comprehensive way to perform a
thorough inspection of your vehicle. It’s your checklist that gives you
immediate feedback on the overall condition of your vehicle. You’ll know
Scheduled Maintenance
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USA(fus)

LATCH .....................................210
recommendations ...................201
Child safety seats - booster
seats ...........................................215
Cleaning your vehicle
engine compartment ..............367
instrument panel ............369–370
interior .....................................371
plastic parts ............................368
safety belts ..............................371
washing ....................................365
waxing .....................................366
wheels ......................................366
wiper blades ............................368
Climate control (see Air
conditioning or Heating) ......80, 83
Clock ......................................62, 64
Compass, electronic
set zone adjustment .................28
Console ......................................102
overhead ..................................102
Controls
power seat ...............................163
steering column ......................115
Coolant
checking and adding ..............383
refill capacities ................386, 414
Cruise control
(see Speed control) ..................113
Customer Assistance ................322
Ford accessories for your
vehicle .....................................373
Ford Extended Service
Plan ..................................424, 427
Getting assistance outside the
U.S. and Canada .....................361
Getting roadside assistance ...322
Getting the service you
need .........................................357Ordering additional owner’s
literature .................................363
Utilizing the
Mediation/Arbitration
Program ...................................361
D
Daytime running lamps
(see Lamps) ................................91
Defrost
rear window and rearview
mirrors .......................................83
windshield .................................83
Dipstick
automatic transmission
fluid ..........................................404
engine oil .................................379
Driving under special
conditions ..................300, 312, 316
sand .........................................314
snow and ice ...........................316
through water .................315, 318
E
Electronic message center ...22, 40
Emergencies, roadside
jump-starting ..........................351
Emergency Flashers .................323
Emission control system ..........399
Engine ........................................418
cleaning ...................................367
coolant .....................................383
diesel ...........................................6
fail-safe cooling .......................387
idle speed control ...................381
refill capacities ........................414
service points ..................376–377
Engine block heater .................273
Engine oil ..................................379
Index
449
2012 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)