Jeep 1997 Grand Cherokee Service Manual page 1362

8W - 47 - 14
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 14
DESCRIPTION AND OPERATION
AMPLIFIER AND SPEAKERS—PREMIUM . . . . . 14
LIMITED PLUS SYSTEM . . . . . . . . . . . . . . . . . . 15
GENERAL INFORMATION
INTRODUCTION
There are three audio systems offered on this vehi-
cle. The standard system uses four speakers. The
premium system includes 120 watt amplifier, Infinity
coaxial full-range speakers mounted in each rear
door, Infinity mid-range speakers mounted in each
front door, and Infinity tweeters mounted at each
outboard end of the instrument panel cover. The Lim-
ited Plus system includes 180 watt amplifier, Infinity
woofers mounted in each rear door, Infinity mid-
range speakers mounted in each front door, Infinity
tweeters mounted at each outboard end of the instru-
ment panel cover, and a sound bar including two
Infinity woofers and two Infinity tweeters.
All systems are powered by circuit X12 from fuse 1
in the junction block. When the ignition switch is in
the ACCESSORY or RUN position, it connects circuit
A1 from fuse 8 in the Power Distribution Center
(PDC) to circuit A31. Circuit A31 powers circuit X12
through junction block fuse 1.
Circuit Z5 provides ground for all radios.
All radios connect to the CCD bus on circuits D1
and D2.
DESCRIPTION AND OPERATION
RADIO MEMORY
On the standard and optional radios, circuit F60
from fuse 20 in the junction block powers the radio
memory. Circuit A7 from fuse 15 in the Power Distri-
bution Center (PDC) powers junction block fuse 20
and circuit F60.
RADIO ILLUMINATION
When the parking lamps or the headlamps are ON,
circuits E2 and L90 are used to power the radio illu-
mination lamps. Circuit E2 is used for the dimmable
lamps. Circuit L90 is the parking lamps feed.
8W - 47 AUDIO SYSTEM
8W-47 AUDIO SYSTEM
INDEX
page
POWER ANTENNA—EXPORT ONLY . . . . . . . . . 15
RADIO ILLUMINATION . . . . . . . . . . . . . . . . . . . 14
RADIO MEMORY . . . . . . . . . . . . . . . . . . . . . . . 14
RADIO REMOTE SWITCHES . . . . . . . . . . . . . . 15
SPEAKERS—STANDARD SYSTEM . . . . . . . . . . 14
SPEAKERS—STANDARD SYSTEM
The standard system uses four speakers. Circuit
X53 feeds the speaker in the left front door. Circuit
X55 is the return from the speaker to the radio.
Circuit X54 feeds the right front door speaker. Cir-
cuit X56 is the return from the speaker to the radio.
From the radio, circuit X51 connects to circuit X52
at the jumper harness for the left rear door speaker.
Circuit X51 and X52 feed the speaker. Circuit X58
from the speaker jumper harness connects to circuit
X57. Circuit X57 is the return from the speaker to
the radio.
Circuit X52 feeds the right rear door speaker. Cir-
cuit X58 is the return from the speaker to the radio.
Circuits X52 and X58 continue through the jumper
harness to the right rear door speaker.
AMPLIFIER AND SPEAKERS—PREMIUM
A power amplifier is used on premium systems
only. The amplifier is connected between the radio
and the speakers.
Circuit A250 from fuse 11 in the Power Distribu-
tion Center (PDC) powers circuit F75 through fuse 7
in the junction block. Circuit F75 feeds the radio
amplifier. Circuit Z5 provides ground for the ampli-
fier. Circuit X60 from the radio supplies power to the
amplifier.
From the radio, circuits X54 and X56 for the right
front speaker and the speaker in the right side of the
instrument panel, connect to the power amplifier.
Circuit X54 is the feed from the radio to the ampli-
fier. Circuit X82 is the feed from the amplifier to the
right instrument panel speaker and right front door
speaker. Circuit X80 is the return from the speakers
to the amplifier and circuit X56 is the return from
the amplifier to the radio. Circuits X80 and X82 from
the amplifier connect to circuits X56 and X54 at the
jumper harness for the right front door speaker.
For the left front door speaker and the speaker in
the left side of the instrument panel, circuits X53
and X55 from the radio connect to the power ampli-
fier. Circuit X53 is the feed from the radio to the
amplifier. Circuit X87 is the feed from the amplifier
ZG
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