Jeep Grand Cherokee 2018 Manual page 33

• When replacing tires, refer to "Tires" in "Ser-
vicing And Maintenance" for the proper tire
replacement procedures. Replacing tires with
a higher load carrying capacity will not in-
crease the vehicle's GVWR and GAWR
limits.
Towing Requirements — Trailer Brakes
• Do not interconnect the hydraulic brake sys-
tem or vacuum system of your vehicle with
that of the trailer. This could cause inad-
equate braking and possible personal injury.
• An electronically actuated trailer brake con-
troller is required when towing a trailer with
electronically actuated brakes. When towing
a trailer equipped with a hydraulic surge
actuated brake system, an electronic brake
controller is not required.
• Trailer brakes are recommended for trailers
over 1,000 lbs (453 kg) and required for
trailers in excess of 2,000 lbs (907 kg).
WARNING!
• Do not connect trailer brakes to your vehi-
cle's hydraulic brake lines. It can overload
your brake system and cause it to fail. You
might not have brakes when you need
them and could have a collision.
WARNING! (Continued)
• Towing any trailer will increase your stop-
ping distance. When towing you should
allow for additional space between your
vehicle and the vehicle in front of you.
Failure to do so could result in a collision.
CAUTION!
If the trailer weighs more than 1,000 lbs
(453 kg) loaded, it should have its own
brakes and they should be of adequate ca-
pacity. Failure to do this could lead to accel-
erated brake lining wear, higher brake pedal
effort, and longer stopping distances.
Towing Requirements — Trailer Lights And
Wiring
Whenever you pull a trailer, regardless of the
trailer size, stoplights and turn signals on the
trailer are required for motoring safety.
The Trailer Tow Package may include a four-
and seven-pin wiring harness. Use a factory
approved trailer harness and connector.
NOTE:
Do not cut or splice wiring into the vehicle's
wiring harness.
(Continued)
The electrical connections are all complete to
the vehicle but you must mate the harness to a
trailer connector. Refer to the following illustra-
tions.
NOTE:
• Disconnect trailer wiring connector from the
vehicle before launching a boat (or any other
device plugged into vehicle's electrical con-
nect) into water.
• Be sure to reconnect after clear from water
area.
Four-Pin Connector
1 — Female Pins 4 — Park
2 — Male Pin 5 — Left Stop/Turn
3 — Ground 6 — Right Stop/Turn
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