wiring NISSAN ALTIMA 2016 L33 / 5.G Towing Guide

2016 NISSAN Towing Guide 8
WARNING- Do not use S-hooks for attaching the safety chains as they may become un-
hooked while towing. If the S-hook unhooks, the emergency chains/cables will become
detached, so if the tow hitch breaks or becomes disengaged, it will allow the trailer to
completely break away causing property damage and possibly personal injury or death.
The use of S-hooks is illegal in many states.
CAUTION- To avoid damage to the bumper and chains/cables when making a sharp turn,
do not attach the chains/cables too close to the coupler. Consult your trailer manufacturer for
the proper location of the chain/cable attachment to the trailer.

REAR VIEW MIRRORS
WARNING- In many cases, a trailer can block your rear vision when you are using only the
standard NISSAN rear view and outside mirrors. Be careful when changing lanes or turning.
Using only these mirrors could cause an accident as they were not designed for towing.


Trailer tow mirrors specifically designed for trailer towing can be adjusted for better visibility
when your rearward vision is obstructed while towing a trailer. Trailer Tow Mirrors are available
as an accessory for certain Nissan vehicles. Before using these mirrors, make certain that
they comply with state and local regulations. It is recommended you contact your NISSAN
dealer for details.

BREAKAWAY SWITCH
On a trailer with electric brakes, a breakaway switch can automatically activate the trailer
brake system if the trailer becomes separated from the tow vehicle. Should the trailer become
detached, a breakaway switch may help prevent the trailer from wandering into another lane.

WARNING-A breakaway switch relies on the power of a trailer battery, so make sure to
maintain the battery’s charge. Never use the breakaway switch to “park” the trailer on a
grade. The battery would eventually discharge and release the brake, allowing the trailer to
roll, which may cause property damage, serious injury or death. Be sure to leave enough
slack in the tether on the breakaway switch to turn corners without binding. If you do not, the
electric trailer brakes will lock-up and not release. See your trailer manufacturer for proper
installation of a breakaway switch that is compatible with your trailer braking system.

TRAILER LIGHTS
Trailer lights should comply with all applicable federal, state, and local regulations, and should
be in proper working order at all times. A trailer’s taillights, stoplights, and turn signal lights
must be wired into the tow vehicle’s electrical system.*
Most trailers operate on a four-wire system in which the stoplights and turn signal lights
utilize the same wire. Most all NISSAN vehicles have separate wires for the stoplights and turn
signal lights, therefore a device called a “converter” is needed.** Specifically, a “powered
* Vehicles equipped with LED taillights require that wiring be connected at a specific location. For
assistance in hooking up trailer lights, contact your NISSAN dealer or a professional supplier of towing equipment.
** Armada, Frontier, Pathfinder, and Titan, vehicles are pre-wired for trailer lighting and do not require a converter.
If your trailer is equipped with a 4-pin connector, an adapter will be needed to connect the trailer lights to the
vehicle. Vehicles equipped with the optional trailer tow package can be equipped with a 7-pin trailer harness
connector.

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converter” must be used to provide power for all trailer lighting. This type of converter
creates only minimal additional electrical demand (draw) on the vehicle lighting circuits, which
provides protection for the vehicle’s sensitive electronics. Always check for correct operation
of the taillights, stoplights, and turn signal lights every time you connect a trailer for towing.
Never replace vehicle fuses with fuses of a higher amperage rating than the original.

CAUTION – Improperly installed or poor quality trailer harness wiring may adversely affect
your vehicle’s electrical system. Use only a NISSAN approved wiring harness, or equivalent,
and consult your dealer or a professional supplier of towing equipment to obtain the proper
equipment and to have it installed.

BRAKES
As with hitches, several types of braking systems are available. Most states require a separate
braking system on trailers with a loaded weight above a specific amount, therefore you should
check to ensure you comply with all regulations and laws. Have a professional supplier of
towing equipment demonstrate proper brake function testing.
Never connect a trailer brake system directly to the vehicle brake system. Most states
require a separate braking system on trailers with a loaded weight of 1,500 lbs. (680 kg)
or more.

Surge Brakes – The surge brake actuator is mounted on the trailer tongue with a hydraulic
line running to each trailer wheel. Surge brakes are activated by the trailer pushing against the
hitch ball when the tow vehicle is braking. Hydraulic surge brakes are common on rental
trailers and some boat trailers. In this type of system, there is no hydraulic or electric
connection for brake operation between the tow vehicle and the trailer.

Electric Trailer Brakes – Electric braking systems are activated by an electronic signal sent
from a trailer brake controller (special brake-sensing module). If electric trailer brakes are used
and the vehicle is not equipped with an integrated trailer brake controller, NISSAN
recommends the installation of an aftermarket trailer brake controller. For adjustment
specifications, refer to the manufacturer’s instructions of the brake controller being installed.
For your convenience, Armada, Frontier, Pathfinder, Titan, and NV vehicles are pre-wired to
accommodate most popular electric trailer brake controllers. A wiring harness* is either
included with your vehicle or available from your NISSAN dealer. This harness provides
electric trailer brake controller input and output connections to the vehicle wiring. See a
professional supplier of towing equipment for electric trailer brake controller availability.

*
Contact a NISSAN dealer or a professional supplier of towing equipment for information on trailers
equipped with electric brakes and for Genuine NISSAN jumper harness availability for your specific vehicle.

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VEHICLE MODIFICATIONS
WARNING - DO NOT modify your vehicle beyond those required for proper hitch
installation, wiring hook-up, or adding extended mirrors on any NISSAN vehicle being used
for towing purposes. Changes to the drivetrain, suspension, exhaust systems, frame
structure/unibody, or other vehicle components are not necessary for towing within the limits
described in this guide. These changes may diminish the reliability and longevity of your
vehicle, void warranty coverage or possibly result in loss of vehicle control and cause an
accident, personal injury or death.

TOOL KIT
When towing, bring tools including, flares, a flashlight, emergency reflectors, jumper cables,
extra fuses, extra radiator coolant, oil, and easily replaced spare parts such as taillight bulbs.
You should also carry spare tires for your tow vehicle and trailer, as well as a jack suitable for
use on the trailer. A trailer jack is an important part of safe towing. Choose a jack that can
raise and lower the trailer so that you can connect the coupler to and disconnect it from the
ball of your hitch. Choose one with a weight capacity that matches or surpasses your trailer
tongue weight.

WARNING - Be aware that your automotive jack is designed for lifting only your vehicle
during a tire change. Using an automobile jack to lift a trailer-bearing load may be unstable
possibly causing it to fall off the jack stand which may result in property damage or serious
injury or death.

BEFORE STARTING OUT
Before starting out on a trip, make one last inspection of the tow vehicle and the trailer. Are
the tire pressures correct? Are the safety chains/cables securely in place? Has the cargo
been tied down securely? Do all the lights work? Is the coupler properly attached over the
hitch ball and secured using a locking pin? Is the breakaway switch hooked up and
functioning properly? Are vehicle and electric trailer brakes working properly?
Make a checklist of key items to inspect. Before towing, always check the tow vehicle’s
engine oil, transmission oil, and coolant before starting out. Finding a potential problem while
in your driveway is better than discovering it miles from home.

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GROSS COMBINED
WEIGHT RATING (GCWR) The maximum allowable combined weight of the vehicle and trailer,
including passengers and all cargo.
GROSS VEHICLE
WEIGHT RATING (GVWR) The maximum allowable weight of the vehicle, including passengers, cargo,
fuel, hitch, trailer tongue load, and any optional equipment.
KING PIN
LOAD The amount of trailer (5th wheel or gooseneck) weight pressing down on the
tow vehicle hitch.
HITCH BALL
A ball that connects the trailer to the tow vehicle hitch that provides the
means by which the trailer pivots during cornering. Available in a number
of sizes and weight capacities, it must correspond to the trailer coupler
size, and have a sufficient capacity rating for the trailer being pulled.

RECEIVER HITCH A frame- or structure-mounted hitch with a receiver that allows removal of
the ball mount.

SAFETY CHAINS/CABLES Provides an emergency connection between the tow vehicle and the trailer,
should the trailer become disengaged for any reason.

SURGE BRAKES
Hydraulic-type braking system activated by inertia. As the tow vehicle
begins to brake, the trailer pushes against the hitch ball, consequently
activating the trailer brakes.

TRAILER TONGUE/COUPLER The part of the trailer that extends forward to meet the tow vehicle, and
carries the coupler assembly.

TRAILER TONGUE
LOAD The amount of trailer (conventional) weight pressing down on the tow
vehicle hitch.

WEIGHT-DISTRIBUTING
HITCH SYSTEM Type of hitch system that helps shift the trailer tongue weight to all trailer
tires and the tow vehicle front tires. Strongly recommended when towing
trailers with a Maximum Trailer Weight greater than 5,000 lbs.

WIRING HARNESS Provides an electrical connection linking the tow vehicle’s electrical system
to the trailer’s system.