2006 Nissan Towing Guide 8 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 and will bring it to a safer stop with less damage.
A breakaway switch relies on the power of a trailer battery, so make sure it is not
discharged. 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.
Be sure to leave enough slack in the tether on the breakaway switch to turn corners
without binding. If 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
signals must be wired* into the tow vehicle’s electrical system. Many trailers use the same
filament of a dual-filament bulb for both stoplights and turn signals. The second filament is
used for the trailer’s taillights. All Nissan vehicles utilize separate filaments for each
function. Direct splicing of this type of trailer lighting may cause damage to your vehicle’s
electrical system and malfunction of the trailer lighting. When connecting your Nissan
vehicle to this type of trailer lighting system, a 3-wire to 2-wire power converter** must be
used. A power converter of this type creates only minimal additional demand (draw) on the
vehicle lighting circuits to power the trailer lighting.
Always check for correct operation of the turn signals, stoplights, and taillights every
time you connect a trailer for towing. Never replace vehicle fuses with fuses of a higher
amperage rating than the original.
NOTE – Improper or poor quality trailer harness wiring may affect your vehicle’s electrical
system. Use only a Nissan approved wiring harness, or consult your dealer or a
professional supplier of towing equipment for compatible equipment.
*See the SPECIFICATIONS section of this guide for wiring harness information specific to your
vehicle.
**Armada, Frontier, Pathfinder, Titan, and Xterra vehicles are pre-wired for trailer lighting and do not
require a converter.
2006 Nissan Towing Guide 21
TOWING
GLOSSARY
5TH WHEEL
HITCH Located just forward of the rear axle centerline, this hitch uses a king pin to serve
as the pivot point for the trailer.
BALL MOUNT A bar that holds the hitch ball and is inserted into the hitch receiver. Also
commonly called a drawbar or “stinger.”
BREAKAWAY SWITCH A safety device using a trailer battery that automatically applies the trailer’s
brakes if it should accidentally become separated from the tow vehicle. A
breakaway switch may be used with both electric or surge trailer brake systems.
BUMPER HITCH A reinforced bumper designed to accommodate a hitch ball.
ELECTRIC TRAILER
BRAKES When the brakes on a tow vehicle are applied, an electric current is sent to an
actuator which applies the trailer’s brakes.
ELECTRIC TRAILER
BRAKE CONTROLLER A device that controls the electric trailer brakes.
GOOSENECK HITCH Located just forward of the rear axle centerline, this hitch uses a ball to serve as
the pivot point for the trailer.
GROSS AXLE
WEIGHT RATING (GAWR) The maximum amount of weight each vehicle axle (front and rear) is designed to
safely carry.
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 and 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 also
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.
