2016 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS relay

TOWING A TRAILER
WARNINGS
Do not exceed the GVWR orthe GAWR specified on thecertification label.
Towing trailers beyond themaximum recommendedgross trailer weight exceeds thelimit of the vehicle and couldresult in engine damage,transmission damage, structuraldamage, loss of vehicle control,vehicle rollover and personalinjury.
Your vehicle may have electricalitems, such as fuses or relays,related to towing. See the Fuseschapter.
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 tow bar with thecorrect rise or drop. When boththe loaded vehicle and trailerare connected, 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 (page38).
You can also find information inthe RV & Trailer Towing Guideavailable at your authorizeddealer, or online.
44Motorhome (TY3) , enUSA, First PrintingTowing

FUSE SPECIFICATION CHART
F53 Power Distribution Box
WARNINGS
Always disconnect the battery beforeservicing high current fuses.
To reduce risk of electrical shock,always replace the cover to thepower distribution box beforereconnecting the battery or refilling fluidreservoirs.
Locate the power distribution box in theengine compartment. It has high-currentfuses that protect your vehicle's mainelectrical systems from overloads.
If the battery has been disconnected andreconnected, you will need to reset somefeatures. See Changing the 12V Battery(page 91).
Protected componentsFuse amp ratingFuse or relay number
Power brake assist module – Hydromax.5A*1
Air conditioning compressor clutch.10A*2
Catalyst monitor sensor.20A*3
63Motorhome (TY3) , enUSA, First PrintingFusesE161519

Protected componentsFuse amp ratingFuse or relay number
Engine heated exhaust gas oxygen sensor#11 and #21.Vapor management valve.
Powertrain control module memory.5A*4Powertrain control module relay coil.
Powertrain control module power.20A*5
Instrument panel dimmer module.20A*6Park lamp feeds.Trailer tow running lamp relay coil.
Ignition coils.20A*7Radio capacitors.
Hydromax – Anti-lock brake systemmodule.30A*8
Powertrain control module.10A*9
Daytime running lamps.20A*10
Fuel pump relay coil.20A*11Powertrain control module power.Fuel pump diode.
Instrument panel - backup lamp feed.25A*12Trailer tow backup lamps feed.
Trailer tow electric brake controller feed.30A**13
Instrument panel battery feed (fuse #9, 15,21).60A**14
Lighting primary fuse.
Trailer tow park lamps.20A**15
Anti-lock brake system module –Hydromax.60A**16
Anti-lock brake system module – Hydro-boost.40A**
Horn feed.20A**17
Backup lamp relay coil.20A**18A/C clutch coil.A/C demand switch.
64Motorhome (TY3) , enUSA, First PrintingFuses

Protected componentsFuse amp ratingFuse or relay number
Not used.—19
Powertrain control module relay coil.30A**20Powertrain control module relay (Powerdistribution box fuses # 3, 5, 7, 18).
Fuel injectors.20A**21Fuel pump motor.Mass air flow sensor.
Cigar lighter feed.20A**22Diagnostic tool connector.
Blower motor feed.40A**23
Instrument panel battery feed (fuses #4,10, 16, 22).50A**24
Ignition switch feed (Instrument panelfuses #1, 5, 7, 11, 13, 14, 17, 19, 23, 36; Powerdistribution box fuses #9, 11).
40A**25
Ignition switch feed (Instrument panelfuses #5, 11, 17, 23, 26, 38).40A**26
Multi-function switch (headlamps).30A**27
Starter relay feed.30A**28Starter motor.
Power brake assist motor – Hydromax.60A**29
Anti-lock brake system module – Hydro-boost.40A**
Air conditioning clutch relay.—R1
Fuel pump relay.—R2
Horn relay.—R3
Starter relay.—R4
Blower motor relay.—R5
Powertrain control module relay.—R6
65Motorhome (TY3) , enUSA, First PrintingFuses

Protected componentsFuse amp ratingFuse or relay number
Fuel pump diode.—Diode 1
Air conditioning clutch diode.—Diode 2
*Mini fuses.
**Maxi fuses.
F59 Power Distribution Box
Protected componentsFuse amp ratingFuse or relay number
Air conditioning compressor clutch.10A*F1
Anti-lock brake system - Hydromax.30A*F2
Powertrain control module keep alivememory.5A*F3
Powertrain control module relay coil.
66Motorhome (TY3) , enUSA, First PrintingFusesE197657

Protected componentsFuse amp ratingFuse or relay number
Not used.—F4
Running lamps.20A*F5Trailer tow lamp relay coil.
Not used.—F6
Reverse lamps.25A*F7Instrument panel fuses #33, 34.
Not used.—F8
Daytime running lamps.20A*F9
Not used.—F10
Not used.—F11
Not used.—F12
Not used.—F13
Not used.—F14
Hydromax pump motor.5A*F15
Vehicle power 1.20A*F16Powertrain control module power.
Vehicle power 2.20A*F17Catalyst monitor sensor.Engine heated exhaust gas oxygen sensor#11 and #21.Vapor management valve.
Vehicle power 4.20A*F18Ignition coils.
Powertrain control module.10A*F19
Hydromax module.10A*F20Brake on/off relay feed.
Powertrain control module.20A*F21Fuel pump diode.
Not used.—F22
Not used.—F23
Not used.—F24
67Motorhome (TY3) , enUSA, First PrintingFuses

Protected componentsFuse amp ratingFuse or relay number
Blower motor relay feed.40A**J1
Headlamps.30A**J2Daytime running lamps on/off relay coil.Headlamp daytime running lamp relayfeed.Instrument panel fuses #25, 31.
Vehicle power.30A**J3Powertrain control module relay feed.Power distribution box fuse F16, F17, F18,J22.
Cigar lighter feed.20A**J4Diagnostic tool connector.
Not used.—J5
Starter relay feed.30A**J6Starter motor.
Anti-lock brake system.40A**J7Hydromax pump60A**
Trailer tow park lamps.20A**J8
Instrument panel fuse #4, 10, 16, 22.50A**J9
4-channel anti-lock brake system module.60A**J10
3-channel anti-lock brake system module.40A**
Fuel pump relay feed.20A**J11Fuel injectors.Mass air flow sensor.Fuel pump motor.
Trailer tow electronic brake.30A**J12
Ignition switch feed (instrument panelfuses #1, 5, 7, 11, 13, 17, 19, 23).40A**J13
Not used.—J14
Instrument panel fuses #9, 15, 21.60A**J15
Horn.20A**J16
Ignition switch feed (instrument panelfuses #1, 5, 7, 11, 13, 17, 19, 23.40A**J17
68Motorhome (TY3) , enUSA, First PrintingFuses

Protected componentsFuse amp ratingFuse or relay number
Not used.—J18
Not used.—J19
Not used.—J20
Not used.—J21
Reverse lamp relay coil.20A**J22A/C clutch relay coil.A/C demand switch.
Horn relay.—R1
Fuel pump relay.—R2
Starter relay.—R3
Backup lamps relay.—R4
Brake on/off relay.—R5
Trailer tow parking lamps relay.—R6
Not used.—R7
Air conditioning clutch relay.—R8
Not used.—R9
Starter relay.—R10
Blower motor relay.—R11
Daytime running lamp/headlamp relay.—R12
Powertrain control module relay.—R13
Fuel pump diode.—D1
Air conditioning clutch diode.—D2
Not used.—D3
Not used.—C1
*Mini fuses.**J-case fuse.
69Motorhome (TY3) , enUSA, First PrintingFuses