relay FORD F250 SUPER DUTY 2017 Owners Manual

TOWING A TRAILER
WARNINGS
Towing trailers beyond themaximum recommendedgross trailer weight exceeds thelimit of your vehicle and couldresult in engine damage,transmission damage, structuraldamage, loss of vehicle control,vehicle rollover and personalinjury.
Do not exceed the GVWR orthe GAWR specified on thecertification label.
Note: See RecommendedTowing Weights (page 277).
Your vehicle may have electricalitems, such as fuses or relays,related to towing. See Fuses(page 312).
Your vehicle's load capacitydesignation is by weight, not byvolume, so you cannot necessarilyuse all available space whenloading a vehicle or trailer.
Towing a trailer places an extraload on your vehicle's engine,transmission, axle, brakes, tiresand suspension. Inspect thesecomponents periodically during,and after, any towing operation.
Load Placement
To help minimize how trailermovement affects your vehiclewhen driving:
•Load the heaviest items closestto the trailer floor.
•Load the heaviest itemscentered between the left andright side trailer tires.
•Load the heaviest items abovethe trailer axles or just slightlyforward toward the trailertongue. Do not allow the finaltrailer tongue weight to goabove or below 10-15% of theloaded trailer weight.
•Select a ball mount with thecorrect rise or drop and loadcapacity. When both theloaded vehicle and trailer areconnected, the trailer frameshould be level, or slightlyangled down toward yourvehicle, when viewed from theside.
When driving with a trailer orpayload, a slight takeoff vibrationor shudder may be present due tothe increased payload weight.Additional information regardingproper trailer loading and settingyour vehicle up for towing islocated in another chapter of thismanual. See Load Limit (page261).
You can also find information inthe RV & Trailer Towing Guideavailable at your authorizeddealer, or online.
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Towing

Protected componentsFuse amp ratingFuse or relay number
Powertrain control module.20A11
Emissions (MIL).20A12
Cooling fan.20A13A/C compressor.Engine brake.
Noise suppression cap.20A14Mass air flow sensor.Emissions.Glow plugs.Urea.
Compressed natural gas fuel controlmodule.15A15
Not used.—6
Not used.—7
Not used.—8
Not used.—9
Heated exterior mirrors.15A110
CNG relay.—11
Heated rear window.40A212
Not used.—13
Powertrain control module relay.—14
Horn.20A115
A/C clutch relay power.10A116
Rear heated window and heated mirrorsrelay.—17
Not used.—18
Not used.—19
Supplemental air heater bank #1 relay.—20
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Fuses

Protected componentsFuse amp ratingFuse or relay number
Not used.—21
Auxiliary power point #5 (rear console).20A222Run-start.
Not used.—23
Cooling fan relay.—24Supplemental air heater bank #3 relay.
Glow plug module power relay.—25
Not used.—26
Trailer tow battery charge relay.30A227
Run-start relay.—29
4x4 module.10A130
Adaptive cruise control.5A131Run-start.
Anti-lock brake system module.5A132Run-start.
Powertrain control module (ISPR).10A133Run-start.Engine control module.Transmission control module.
Blind spot information system.10A134Run-start.Front camera.Rear camera.
Not used.—35
Blower motor relay.—36
Trailer tow battery charge relay.—37
A/C compressor clutch relay.—38
Horn relay.—39
Supplemental air heater bank #2 relay.—40
Glow plugs.25A241
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Fuses

Protected componentsFuse amp ratingFuse or relay number
Trailer tow lighting module.40A242
Front blower motor.40A243
Voltage quality module.50A344Body control module.
Active front steering.60A345
Supplemental air heater bank #2.50A346
Cooling fan.50A347Supplemental air heater bank #3.
Body control module RP1 bus.50A348
Inverter.60A349
Body control module RP2 bus.50A350
Body control module B+ feed.60A351
Anti-lock brake system pump.60A352
Supplemental air heater bank #1.50A353
Trailer brake control module.30A254
Climate controlled seat module.30A255
Auxiliary lighting module.40A256
Power running boards.30A257
Compressed natural gas fuel controlmodule relay.30A258
Anti-lock brake system valve.30A259
Not used.—60
Driver power seat.30A261
Auxiliary power point #1 (instrumentpanel).20A262
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Fuses

Protected componentsFuse amp ratingFuse or relay number
Starter motor.30A263
Auxiliary power point #2.20A264
Trailer tow lighting module.30A265
Auxiliary power point #3 (center console).20A266
Passenger power seat.30A267
Auxiliary power point #4 (rear media bin).20A268
4x4 module.25A269
Not used.—70
Not used.—71
Trailer tow left hand/right hand stop/turn.30A272
Not used.—73
Not used.—74
Fuel pump.30A275
Not used.—76
Wiper motor.30A277
Not used.—78
Power sliding rear window.30A279
4x4 module.25A180
4x4 solenoid.10A181
Power telescoping mirrors.10A182
Rear heated seats.20A183
Trailer tow backup lamps.10A184
Not used.—85
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Fuses

Protected componentsFuse amp ratingFuse or relay number
Not used.—86
Not used.—87
Multi contour seats.10A188
Not used.—89
Spot light module.10A190
Upfitter interface module.10A191
Not used.—92
Not used.—93
Transmission control module.15A194
Powertrain control module keep alivepower.10A195
Rain sensor.5A196
Not used.—97
Alternator sense.10A198
Trailer tow parking lamps.30A199
1Micro fuse.2M-type fuse.3J-type fuse.
Passenger Compartment FusePanel
The fuse panel is located under theinstrument panel to the left of the steeringcolumn.
Note:It may be easier to access the fusepanel if you remove the finish trim piece.
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Fuses

Protected componentsFuse amp ratingFuse or relay number
Not used.—1
Memory seat switch (lumbar power).7.5A12
Driver door unlock relay.20A13
Aftermarket electronic brake controller.5A14
Rear heated seat module.20A15
Not used.—6
Not used.—7
Not used.—8
Not used.—9
Securicode™ keyless entry keypad.5A210
Rear climate control module.5A211
Front climate control module.7.5A212
Instrument cluster.7.5A213
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FusesE145984

Protected componentsFuse amp ratingFuse or relay number
Smart data link.Steering column control module.
Not used.—14
Smart datalink connector power.10A215Heads up display.
Not used.—16
Electronic finish panel.5A217
Push button ignition switch.5A218Ignition switch.Key inhibit.
Transmission control switch (tow/haul).7.5A219
Not used.—20
Terrain management system.5A221Head-up display.Humidity sensor.
Occupant classification sensor.5A222
Accessory delay.10A123Power windows.Moonroof.Power folding mirrors relay.Inverter.Window/moonroof switch illumination.
Central locking system relay.20A124
Left-hand front smart window motor.30A125Door zone module.
Right-hand front smart window motor.30A126Door zone module.
Moonroof.30A127
Sony amplifier - 10 channel.20A128
Sony amplifier - 14 channel.30A129
Not used.—30
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Fuses

Protected componentsFuse amp ratingFuse or relay number
Not used.—31
SYNC.10A132GPS module.Display.Radio frequency receiver.
Radio.20A133
Run-start relay.30A134
Restraints control module.5A135
Lane keeping system.15A136Automatic high beam control.Auto-dimming mirrors.Rear heated seats.
Heated steering wheel.20A137
Left-hand front window motor.30A 338Rear power window motors.
1Micro fuse.2Dual micro fuse.3Circuit breaker.
CHANGING A FUSE
Fuses
WARNING
Always replace a fuse with one thathas the specified amperage rating.Using a fuse with a higher amperagerating can cause severe wire damage andcould start a fire.If electrical components in the vehicle arenot working, a fuse may have blown. Blownfuses are identified by a broken wire withinthe fuse. Check the appropriate fusesbefore replacing any electricalcomponents.
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FusesE217331

•An authorized dealer needs to installmobile communications systems.Improper installation may harm theoperation of your vehicle, particularlyif the manufacturer did not design themobile communication systemspecifically for automotive use.
•If you or an authorized Ford dealer addany non-Ford electrical or electronicaccessories or components to yourvehicle, you may adversely affectbattery performance and durability. Inaddition, you may also adversely affectthe performance of other electricalsystems in the vehicle.
The auxiliary switch option packageprovides six switches mounted in theoverhead console. These switches operatewhen the vehicle is running or from batterypower, depending on the switchable fuseAUXF4's location in the upfitter relay box.We recommend, however, that the engineremain running to maintain battery chargewhen using the auxiliary switches forextended periods of time or higher currentdraws.
Note:When your vehicle has a dieselengine, use the auxiliary switches only whenthe engine is running. The glow plugs alsodrain battery power when the ignition key isin the on position. Using the auxiliaryswitches, even for limited amounts of time,can cause your battery to drain quickly andprevent your vehicle from restarting.
When switched on, the auxiliary switchesprovide electrical battery power for avariety of personal or commercial uses.Switches 1 through 4 provide 25 amps.Switches 5 and 6 provide 40 amps.
The relay box for the auxiliary switches isin the rear of the engine compartment,near the back wall. See your authorizeddealer for service.
The relays are coded as shown:
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AccessoriesE220728 E220729