Dodge Ram 2010 Owner's Manual page 446

446 STARTING AND OPERATING
WARNING!
Connecting a trailer that is not compatible with the
ITBM system may result in reduced or complete loss
of trailer braking. There may be a increase in stop-
ping distance or trailer instability which could result
in personal injury.
NOTE: A aftermarket controller may be available for
use with trailers with air or electric-over-hydraulic trailer
brake systems. To determine the type of brakes on your
trailer and the availability of controllers, check with your
trailer manufacturer or dealer.
Towing Requirements — Trailer Lights and Wiring
Whenever you pull a trailer, regardless of the trailer size,
stop lights and turn signals on the trailer are required for
motoring safety.
The Trailer Tow Package will include a four and seven-
pin wiring harness. Use a factory approved trailer har-
ness and connector.
NOTE: Do not cut or splice wiring into the vehicle's
wiring harness.
The electrical connections are all complete to the vehicle
but you must mate the harness to a trailer connector.
Refer to the following illustrations.