ESSENTIAL TOWING CHECKS
Follow these guidelines for safe towing:
•Do not tow a trailer until you drive yourvehicle at least 1,000 mi (1,600 km).
•Consult your local motor vehicle lawsfor towing a trailer.
•See the instructions included withtowing accessories for the properinstallation and adjustmentspecifications.
•Service your vehicle more frequently ifyou tow a trailer. See your scheduledmaintenance information.
•If you use a rental trailer, follow theinstructions the rental agency givesyou.
Another chapter of this manual containsload specification terms found on the tirelabel and Safety Compliance label andinstructions on calculating your vehicle'sload. See Load Limit (page 38).
Remember to account for the trailertongue weight as part of your vehicle loadwhen calculating the total vehicle weight.
Hitches
Do not use a hitch that either clamps ontothe bumper or attaches to the axle.
Distribute the trailer load so 10-15% of thetotal trailer weight is on the tongue.
Weight-Distributing Hitches
WARNING
Do not adjust a weight-distributinghitch to any position where the rearbumper of the vehicle is higher thanit was before attaching the trailer. Doingso will defeat the function of theweight-distributing hitch, which may causeunpredictable handling, and could resultin serious personal injury.
When hooking-up a trailer using aweight-distributing hitch, always use thefollowing procedure:
1.Park the loaded vehicle, without thetrailer, on a level surface.
2.Measure the height to the top of yourvehicle’s front wheel opening on thefender. This is H1.
3.Securely attach the loaded trailer toyour vehicle without theweight-distributing bars connected.
4.Measure the height to the top of yourvehicle’s front wheel opening on thefender a second time. This is H2.
5.Install and adjust the tension in theweight-distributing bars so that theheight of your vehicle’s front wheelopening on the fender is approximatelyhalfway between H1 and H2.
6.Check that the trailer is level or slightlynose down toward your vehicle. If not,adjust the ball height accordingly andrepeat Steps 1-6.
7.Lock the bar tension adjuster in place.
8.Check that the trailer tongue securelyattaches and locks onto the hitch.
9.Install safety chains, lighting and trailerbrake controls as required by law or thetrailer manufacturer.
Safety Chains
Note:Never attach safety chains to thebumper.
Always connect the safety chains to thehook retainers of your vehicle hitch.
To connect the safety chains, cross themunder the trailer tongue and allow enoughslack for turning tight corners. Do not allowthe chains to drag on the ground.
47Motorhome (TY3) , enUSA, First PrintingTowing
Trailer Brakes
WARNING
Do not connect a trailer's hydraulicbrake system directly to yourvehicle's brake system. Your vehiclemay not have enough braking power andyour chances of having a collision greatlyincrease.
Electric brakes and manual, automatic orsurge-type trailer brakes are safe if youinstall them properly and adjust them tothe manufacturer's specifications. Thetrailer brakes must meet local and federalregulations.
The rating for the tow vehicle's brakingsystem operation is at the gross vehicleweight rating, not the gross combinedweight rating.
Separate functioning brake systemsare required for safe control of towedvehicles and trailers weighing morethan 1500 pounds (680 kilograms)when loaded.
Trailer Lamps
WARNING
Never connect any trailer lamp wiringto the vehicle's tail lamp wiring; thismay damage the electrical systemresulting in fire. Contact your authorizeddealer as soon as possible for assistancein proper trailer tow wiring installation.Additional electrical equipment may berequired.
Trailer lamps are required on most towedvehicles. Make sure all running lights, brakelights, direction indicators and hazard lightsare working.
Before Towing a Trailer
Practice turning, stopping and backing upto get the feel of your vehicle-trailercombination before starting on a trip.When turning, make wider turns so thetrailer wheels clear curbs and otherobstacles.
When Towing a Trailer
•Do not drive faster than 70 mph(113 km/h) during the first 500 mi(800 km).
•Do not make full-throttle starts.
•Check your hitch, electrical connectionsand trailer wheel lug nuts thoroughlyafter you have traveled 50 mi (80 km).
•When stopped in congested or heavytraffic during hot weather, place thegearshift in park (P) to aid engine andtransmission cooling and to help airconditioning performance.
•Switch off the speed control withheavy loads or in hilly terrain. Thespeed control may turn offautomatically when you are towing onlong, steep grades.
•Shift to a lower gear when driving downa long or steep hill. Do not apply thebrakes continuously, as they mayoverheat and become less effective.
•If your transmission is equipped with aGrade Assist or Tow/Haul feature, usethis feature when towing. This providesengine braking and helps eliminateexcessive transmission shifting foroptimum fuel economy andtransmission cooling.
•Allow more distance for stopping witha trailer attached. Anticipate stops andbrake gradually.
•Avoid parking on a grade. However, ifyou must park on a grade:
1.Turn the steering wheel to point yourvehicle tires away from traffic flow.
48Motorhome (TY3) , enUSA, First PrintingTowing
•Use the speed control in hilly terrain.
•Rest your foot on the brake pedal whiledriving.
•Drive a heavily loaded vehicle or tow atrailer.
•Carry unnecessary weight(approximately 1 mpg [0.4 km/L] islost for every 400 lb [180 kilogram] ofweight carried).
•Driving with the wheels out ofalignment.
Conditions
•Heavily loading a vehicle or towing atrailer may reduce fuel economy at anyspeed.
•Adding certain accessories to yourvehicle (for example bug deflectors,rollbars, light bars, running boards, skiracks or luggage racks) may reducefuel economy.
•To maximize the fuel economy, drivewith the tonneau cover installed (ifequipped).
•Using fuel blended with alcohol maylower fuel economy.
•Fuel economy may decrease with lowertemperatures during the first 8–10miles (12–16 kilometers) of driving.
•Driving on flat terrain offers improvedfuel economy as compared to drivingon hilly terrain.
•Transmissions give their best fueleconomy when operated in the topcruise gear and with steady pressureon the gas pedal.
•Four-wheel-drive operation (ifequipped) is less fuel efficient thantwo-wheel-drive operation.
•Close the windows for high-speeddriving.
DRIVING THROUGH WATER
WARNING
Do not drive through flowing or deepwater as you may lose control of yourvehicle.
Note:Driving through standing water cancause vehicle damage.
Note:Engine damage can occur if waterenters the air filter.
Before driving through standing water,check the depth. Never drive through waterthat is higher than the bottom of the wheelhubs.
When driving through standing water, drivevery slowly and do not stop your vehicle.Your brake performance and traction maybe limited. After driving through water andas soon as it is safe to do so:
•Lightly press the brake pedal to dry thebrakes and to check that they work.
•Check that the horn works.
•Check that the exterior lights work.
•Turn the steering wheel to check thatthe steering power assist works.
52Motorhome (TY3) , enUSA, First PrintingDriving HintsE176913
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
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
UPS Power Distribution Box 1
Protected componentsFuse amp ratingFuse or relay number
Powertrain control module.RelayR1
Daytime running lamps.RelayR2
Starter motor.RelayR3
Blower motor.RelayR4
Horn.RelayR5
Fuel pump.RelayR6
Starter ground.RelayR7
Trailer tow parking lamps.RelayR8
Backup lamps.RelayR9
Hydromax brake on/off relay.RelayR10
Not used.RelayR11
Air conditioning clutch.RelayR12
Hydromax brake on/off relay.10AM1-1
Turn/hazard brake lighting.20AM1-2
Not used.—M1-3
Not used.—M1-4
70Motorhome (TY3) , enUSA, First PrintingFusesE172543
Protected componentsFuse amp ratingFuse or relay number
Fuel pump.DiodeD2
Air conditioning.DiodeD3
Not used.—R2-1
Powertrain control module vehicle power.30A**J1
Fuel pump.20A**J2
Cigar lighter power point.20A**J3Diagnostic connector.
Blower motor.40A**J4
Headlamps.30A**J5Daytime running lamps on/off relay coil.Headlamp daytime running lamp relayfeed.
Ignition switch feeds (instrument panelfuses #F26).40A**J6
Ignition switch feeds (instrument panel#F21, F26).40A**J7
Instrument panel fuse box F11, F13, F15.50A**J8
Starter relay feed.30A**J9
4–channel anti-lock brake system module(Hydromax).60A**J10
Trailer tow electronic brake.30A**J11
Lighting (instrument panel fuses #F3, F5;power distribution box M1-2).60A**J12
Vehicle power 3.20A**J13
Horn.20A**J14
4–channel anti-lock brake system module.60A**J15
Trailer tow parking lamps.20A**J16
*Mini fuse.**J-case fuse.
72Motorhome (TY3) , enUSA, First PrintingFuses