2003 JEEP GRAND CHEROKEE coil

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Page 376 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual not attach the wire harness connectors until the cur-
ing process is complete.
(11) Check the operation of the rear glass heating
grid.
REAR WINDOW DEFOGGER
RELAY
DESCRIPTION
The rear window defogger

Page 377 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (3) The relay normally open terminal (87) is con-
nected to the common feed terminal (30) in the ener-
gized position. This terminal supplies battery voltage
to the rear glass heating grid and to the

Page 392 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CONDITION POSSIBLE CAUSES CORRECTION
HORN SOUNDS
CONTINUOUSLY1. Faulty horn relay. 1. Refer to Horn Relay for the proper horn relay
diagnosis and testing procedures. Replace the
horn relay or repair t

Page 393 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (6) Remove both horns and the mounting bracket
from the right extension of the radiator closure
assembly as a unit.
INSTALLATION
(1) Position both horns and the mounting bracket
onto the right extensi

Page 394 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO ELECTRICAL, RESTRAINTS
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, OR INSTRUMENT PANEL
COMPONENT DIAGNOSIS OR SERVICE. FAILURE
TO TAKE

Page 395 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual HORN SWITCH
DESCRIPTION
A center-blow, normally open, resistive membrane-
type horn switch is secured in a plastic tray that is
inserted in a pocket sewn on the front of the driver
side airbag retaine

Page 398 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual IGNITION CONTROL
TABLE OF CONTENTS
page page
IGNITION CONTROL
DESCRIPTION..........................1
OPERATION............................1
SPECIFICATIONS
ENGINE FIRING ORDER - 4.0L 6-CYLINDER
ENGINE.

Page 399 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual The ignition system is controlled by the powertrain
control module (PCM) on all engines.
The ignition system consists of:
²Spark Plugs
²Ignition Coil(s)
²Powertrain Control Module (PCM)
²Crankshaf