2007 Grand Cherokee WK Factory Service Manual 8 - ELECTRICAL

AMPLIFIER

DESCRIPTION



Vehicles equipped with the Boston Acoustics speaker package have a separate amplifier unit. The amplifier is rated at 288 watts. The amplifier is mounted to the left rear quarter panel behind the quarter trim panel.

OPERATION

The amplifier receives fused battery current from a fuse in the Integrated Power Module (IPM) at all times. The internal circuitry of the amplifier switches the amplifier on based upon a CAN bus message that is received from the radio receiver whenever the radio is turned on. The amplifier receives the sound signal inputs from the left and right rear outputs of the radio, then sends the amplified speaker outputs for each of those channels to the speakers.

REMOVAL



WARNING: On vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, driver airbag, passenger airbag, seat belt tensioner, side curtain airbag, front impact sensor, side impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury.


1. Disconnect and isolate the battery negative cable.
2. Remove the left quarter trim panel.
3. Disconnect the two wire harness connectors from the amplifier.
4. Remove the mounting fasteners.
5. Remove the amplifier.

INSTALLATION



WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, SIDE CURTAIN AIRBAG, FRONT IMPACT SENSOR, SIDE IMPACT SENSOR, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.


1. Position the amplifier into place.
2. Install and tighten the mounting fasteners.
3. Connect the two wire harness connectors.
4. Install the left quarter trim panel.
5. Connect the battery negative cable.