Jeep Grand Cherokee, Operating Information Manual

Page: 214 / 315

Pin
Number
Function Wire
Color
5 Right Rear Position,
Side Marker Lights,
and Rear Registra-
tion Plate Illumina-
tion Device.
b
Brown
6 Stop Lights Red
7 Left Rear Position,
Side Marker Lights,
and Rear Registra-
tion Plate Illumina-
tion Device.
b
Black
8 Reverse lights Red/Black
9 Permanent Power
Supply (+12V)
Brown/
White
10 Power Supply Con-
trolled by Ignition
Switch (+12V)
Red
11
a
Return for Contact
(Pin) 10
White
12 Reserve for Future
Allocation
Red/Blue
13
a
Return for Contact
(Pin) 9
White
Pin
Number
Function Wire
Color
Note: The allocation pin 12 has been
changed from “Coding for coupled Trailer” to
“Reserve for Future Allocation.”
a
The three return circuits shall not be con-
nected electrically in the trailer.
b
The rear position registration plate illumina-
tion device shall be connected such that no
light of the device has a common connection
with both pins 5 and 7.
Towing Tips
Before setting out on a trip, practice turning,
stopping and backing the trailer in an area
away from heavy traffic.
Manual Transmission – If Equipped
If using a manual transmission vehicle for trailer
towing, all starts must be in first gear to avoid
excessive clutch slippage. Additionally, when
starting on a steep grade (greater than 10%) 4
LO should be used to avoid excessive clutch
slippage. The vehicle should be returned to
either 2WD or 4 AUTO mode once on level
ground.
Automatic Transmission – If Equipped
The “DRIVE” range can be selected when
towing. However, if frequent shifting occurs
while in this range, select TOW/HAUL mode (if
equipped) or a lower gear range.
NOTE:
Using “TOW/HAUL” mode (3.7L Engine) or
selecting a lower gear range using the Elec-
tronic Range Select (ERS) feature (2.8L Die-
sel Engine) while operating the vehicle un-
der heavy operating conditions will improve
performance and extend transmission life
by reducing excessive shifting and heat
build up. This action will also provide better
engine braking.
The automatic transmission fluid and filter
should be changed if you REGULARLY tow a
trailer for more than 45 minutes of continuous
operation. Refer to “Maintenance Schedule” for
the proper maintenance intervals.
210