2012 FORD F250 heater

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
31 5A Trailer brake controller (brake
signal), Customer access
32 15A Moon roof, Telescoping mirror
switch, 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
Roadside Emergencies
326
2012 F-250/350/450/550(f23)
Owners Guide, 4th Printing
USA(fus)

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.
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
Roadside Emergencies
327
2012 F-250/350/450/550(f23)
Owners Guide, 4th Printing
USA(fus)

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
10 — Not used
11 — Not used
12 — Not used
13 — Not used
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)
Roadside Emergencies
328
2012 F-250/350/450/550(f23)
Owners Guide, 4th Printing
USA(fus)

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.
1. Connect the positive (+) jumper
cable to the positive (+) terminal of
the discharged battery.
2. Connect the other end of the
positive (+) cable to the positive
(+) terminal of the assisting battery.
3. Connect the negative (-) cable to
the negative (-) terminal of the
assisting battery.
4. Make the final connection of the
negative (-) cable to an exposed
metal part of the stalled vehicle’s
engine, away from the battery and
the carburetor/fuel injection system.
Note:Do not attach the negative (-) cable to fuel lines, engine rocker
covers, the intake manifold or electrical components as grounding points.
WARNING:Do not connect the end of the second cable to the
negative (-) terminal of the battery to be jumped. A spark may
cause an explosion of the gases that surround the battery.
Ensure that the cables are clear of fan blades, belts, moving parts of both
engines, or any fuel delivery system parts.
+–
+–
2
3
14
Roadside Emergencies
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Owners Guide, 4th Printing
USA(fus)

Check every six months
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 make sure 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
what’s been checked, what’s okay, as well as those things that may
require future or immediate attention. The multi-point vehicle inspection
is one more way to keep your vehicle running great!
Scheduled Maintenance
427
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Owners Guide, 4th Printing
USA(fus)

LATCH .....................................206
recommendations ...................197
Child safety seats -
booster seats .............................212
Cleaning your vehicle
engine compartment ..............363
instrument panel ............365–366
interior .....................................367
plastic parts ............................364
safety belts ..............................367
washing ....................................361
waxing .....................................362
wheels ......................................362
wiper blades ............................364
Climate control (see Air
conditioning or Heating) ......78, 81
Clock ......................................61, 63
Compass, electronic
set zone adjustment .................27
Console ......................................100
overhead ..................................100
Controls
power seat ...............................159
steering column ......................112
Coolant ......................................379
checking and adding ..............379
refill capacities ................383, 411
Cruise control
(see Speed control) ..................110
Customer Assistance ................319
Ford accessories for your
vehicle .....................................369
Ford Extended Service
Plan ..................................421, 423
Getting assistance outside
the U.S. and Canada ..............357
Getting roadside assistance ...319
Getting the service you
need .........................................353Ordering additional owner’s
literature .................................359
Utilizing the
Mediation/Arbitration
Program ...................................357
D
Daytime running lamps
(see Lamps) ................................89
Defrost
rear window and rearview
mirrors .......................................81
windshield .................................81
Dipstick
automatic transmission
fluid ..........................................400
engine oil .................................375
Driving under special
conditions ..................295, 309, 312
sand .........................................311
snow and ice ...........................313
through water .................311, 315
E
Electronic message center ...22, 39
Emergencies, roadside
jump-starting ..........................348
Emergency Flashers .................320
Emission control system ..........396
Engine ........................................415
cleaning ...................................363
coolant .....................................379
diesel ...........................................7
fail-safe cooling .......................384
idle speed control ...................377
refill capacities ........................411
service points ..................371–373
Engine block heater .................269
Index
443
2012 F-250/350/450/550(f23)
Owners Guide, 4th Printing
USA(fus)