Bose Speaker Amplifiers
Used on 1987 through 1992 Allante's
The "radio" on 1987 to 1992 Allante's is a combionation of components
located in different places on the car:
-The control head is located in the Driver Information Center panel. There
is additional interface through the rear circuit board in the DIC panel.
-The radio receiver is located behind the glovebox.
-There are four speaker amplifiers: one in the front lower corner of each
door, one over the battery, and one behiond the driver seat opposite the
one over the battery.
-The automatic antenna.
-The Bose speaker amp relay, located in front of the antenna.
In addition to these components, the 1987 through 1989 Allante's have
a cassette player in the DIC panel which is an integral part of the stereo
system. 1990 through 1992 Allante's also have a CD player. Even though
all the DIC panels are the same size across all Allante' years. it is
not possible to install a later panel with CD player into the earlier
Allante's and make it work. It will physically fit. But the car will be
in a continual "SYSTEM FAULT" condition since serial data line
communication will be disrupted. Wiring is different and embedded software
Allante'source can provide whatever parts you need to restore your stereo
system to like- new condition. We carry rebuilt antennas, rebuilt radio
receivers, rebuilt speaker amplifiers, rebuilt CD players, and rebuilt
cassette players. Usually we have all of these items in satock on an exchange
basis. If we run out, there will be a short wait, or you can send in your
parts for rebuilding.
If you need help diagnosing a problem with your stereo system, we will
be glad to help. You can phone us a 561-844-3938 or e-mail us at email@example.com
Replacing your BOSE SPEAKER AMPS
A significant number of Bose speaker/amps in Allantes fail. 1991’s
and 1992’s seem to be the affected the most, but over time the earlier
years have been catching up. As the amplifiers are failing, they tend
to emit an intermittent screeching sound, which gets progressively worse.
It is best not to use the radio or tape or CD players once the screeching
begins, since this can cause more expensive problems to occur elsewhere
in your sound system. Rather than replacing the speaker/amps with new
units, it is much less expensive to have them rebuilt. Also, this rebuilding
should be a lifetime repair. Rebuilt speaker amps are available from Allantesource.com
on an exchange basis at about ¼ the cost of new replacements. It
is best to replace all four units at the same time, as the remaining units
will fail at an accelerated rate once any of them have been rebuilt. But
you can replace them one at a time if you wish. If any amps are making
weird noises, or are not playing, they should be unplugged right away.
To order, please e-mail for information. Include the year of your Allante'.
Rebuilt Bose speaker amps are available for 1987-1988 Allante's, 1989-1990
Allante's, and 1991-1992 Allante's. The 1993 Allante's do not use these
components. Simply replacing the speakers with aftermarket speakers can
NEVER fix an Allante' stereo problem. Allante' speakers have different
impedance than other automotive speakers. If old speakers are removed
and discarded, new speakers will be required. This drives up the cost
of the repair.
Rear speaker amp replacement
Removing the rear speaker/amplifiers is very easy. The right rear is behind
the battery cover. Fold down the partition between the trunk and the passenger
compartment. Slide out the battery cover. Slide out a small piece of trim
behind the battery cover, which may have one retaining screw in the bottom
corner. Then disconnect the plug, and remove the four screws holding the
speaker. To install the rebuilt speaker amp, just reverse these simple
steps if you have the complete enclosure. If you have just the amp, your
old unit will need to be disassembled, and the rebuilt amp board installed
into your old housing. The left side speaker is behind the trim panel
on the other side of the rear deck. The trim panel slides out in much
the same way as the right side, although on 1990.5 and up models you have
a little bit of a struggle to clear the soft top switch panel. Insert
a screwdriver behind the switch panel, and gently pry the lip of the trim
panel out from behind the switch panel. Then there is another trim piece
behind it that must be removed to gain access to the rear mounting screws,
just as on the right side. It is ALWAYS a good idea to check each amp
for proper operation right after it is plugged in. It does not matter
if any or all are plugged in at any given time. No harm will be done to
the stereo system.
Front speaker amp replacement
Removing the two front speakers from the doors does not require any special
tools, and is not that difficult. Probably the hardest part of the job
is getting the door panel back together properly with everything hooked
up correctly. Pay special attention to the door lock and door handle linkage
as you are removing it. Otherwise, the project is not difficult.To remove
the lower portion of the door panels, first remove the two screws in the
armrest grip. These are Phillips head screws. One way is to use a stubby
screwdriver to remove them, since the top of the upper door panel tapers
in, preventing you from getting a straight shot into the screw head with
a standard length screw driver. The best method is to use the proper size
Phillips bit from a screwdriver with interchangeable bits, inserted into
a ¼" hex socket and ¼" drive ratchet. This provides
plenty of torque. There are two possible problems here to avoid. First,
the screw heads could be filled with foreign matter. Second, if you have
had significant water leaks over a long time, these screws could be rusted
in. Take special care to clean out the slots and not strip the heads.
If you use the ¼" drive ratchet, make sure you stay straight
and keep adequate downward pressure on the ratchet. This is a little bit
difficult since you are right up against the door panel. Once the two
retaining screws have been removed, the armrest can be rotated up and
out of the slots that hold it. Lift up the edge by the door panel, and
push the armrest toward the door to allow the plastic tabs on the bottom
to come out of the slots underneath. Once the armrest is removed, there
are 4 screws holding the armrest bracket to be removed: two going down
and two going into the door panel. On later Allante’s, the express
down relay is mounted underneath, and must be unplugged. There is a plastic
retaining tab that must be removed before the electrical connector can
be disconnected. Once the bracket has been removed, push up or pry up
the rear of the power window switch. Carefully pull the wiring up out
of the mounting hole. If the switch case separates, BE VERY CAREFUL NOT
TO LET THE SWITCH CASE SEPARATE. The are four internal contacts inside
that can fall out if the switch comes apart. The driver's door has two
connectors on the back of the switch to unplug, then three connectors
about 8" away in the wiring. If the switch has never been removed
before, there will be a cable tie holding thw wires to thje door panel.
This tie must be cut before before the connectors can be unsnapped. Next
pull the interior door handle to the "open door" position to
gain access to the two screws behind the handle, and remove them. Looking
down inside the switch hole, you will see the door handle linkage. There
is a green plastic clip that holds the linkage to the door handle. The
clip must be rotated more than 90 degrees to unclip it from where it connects
around the linkage, then the end of the link will lift up from the door
handle, and the door handle will come free.Next, there are three screws
on the very bottom of the door panel that must be removed. You have to
get down very low and look up to see them. Two are in the vinyl-coated
section of the panel, and one is in the carpeted section. Once these three
screws have been removed, the panel will be loose. Move the door lock
paddle to the locked position. Pull out the bottom of the panel, then
pull out then down on the to to remove the clips from behind the upper
door panel. Hold the panel, and disconnect the power door lock linkage.
This has the same type of connector as the door handle. Rotate the green
plastic clip 90 degrees to unclip from around the linkage, then pull the
end of the linkage free. On the driver’s door panel, the connector
for the power mirror adjustment switch on 1990-1992 models must also be
unplugged. The door panel can then be set aside.The speaker/amps are located
in the front corner of each of the doors. Remove the four screws holding
the rear retaining bracket. Then there are one nut and one screw to remove
on the front of the speaker amp, and the unit will be free. To find them,
you will need to push the water deflector out of the way on the edge of
the speaker amp closest to the door pillar. Disconnect the electrical
connector, and remove the unit from the vehicle. Remove the two nuts holding
the rear mounting bracket to the speaker. To reinstall the rebuilt speaker
amp, just reverse these steps.When reinstalling the door panel, pay special
attention to the power door lock linkage. This passes through a cut-out
in the water deflector, and must move freely in order for the power door
locks to work properly. It is difficult to reconnect the linkage with
the panel mounted to the door. I support the panel, reconnect the linkage,
and then mount the panel back on the door. The door handle can also be
a struggle. There is a floating nut plate where the two screws attach
that needs to be immobilized. Others have suggested tips such as putty
or tape to do this. Putty is messy and tape doesn’t allow movement.
The best way is to take the rounded end of a ballpeen hammer, with the
bracket removed from the speaker amp enclosure, gently tap in the sheet
metal pocket to create a drag on the nut plate. The plate still needs
to move when prying it for final location, but it needs to stay where
you put it. Don’t overdo the drag. Create just enough to hold it
in place. Center the tapped holes in the nut plate with the punched holes
in the door. That way, the screws will go right in. Just make sure not
to cross thread them. They have a very fine thread. When pushing the window
switch wires back into the door after reconnecting the switch, make sure
you keep them away from the power door lock linkage. They can cause the
door locks to malfunction by placing a drag on the linkage. Otherwise,
reassembly is pretty straightforward. If you have any specific questions
or problems, you can email them to firstname.lastname@example.org
CD and cassette player replacement
The DIC combo panel must be removed from the car to remove either the
CD or the cassette players. This procedure covers the combo panels in
1990 through 1993 Allante'. The procedure is about the same but simpler
for 1987 through 1989 models. To remove the DIC, first disconnect the
negative battery terminal. The battery is located behind the removable
panel on the right side of the area behind the passenger seat.
Next, remove the louver on the AC vent on top of the DIC. Insert a small
screwdriver on either side between the louver and frame, and gently pry
the louver out. There are spring mounting clips on each side. Once you
have moved the louver far enough to clear the clip, it will pop right
out. Behind the louver you will see two screws in the top of the case.
Remove these two screws.
Insert one finger inside the cassette door, and try to pull the DIC panel
out. If it slides out at this point, it means the panel was previously
removed, and the bottom screws not reinstalled. If it slides out, you
will have a lot less work to do. You can skip down to the step in which
the DIC slides out. We do not reinstall bottom screws to simplify DIC
removal in the future.
Otherwise, several under dash components must be removed from the driver’s
side only. The first is the left side sound insulator, which surrounds
the brake pedal. Remove the five screws and two retaining nuts that secure
this panel. Remove the courtesy light from the sound insulator by pressing
on the plastic clips, and then remove the wires from the light assembly.
Next remove the trim panels at both sides under the sound insulator. There
is one screw holding each piece. The following applies to 1990 through
1993 Allantés. 1987-89 is somewhat easier. You can get at the bottom
bolts much more easily on the earlier Allantés.
Remove the two screws holding the hood release lever, and let it rest
on the floor.
Remove the knee booster panel from underneath the steering column by removing
the two screws and four bolts that secure it to the car.
Next, remove the two bolts holding the bracket to which the right side
of the knee bolster was attached. You will see the bottom of the DIC once
this bracket is removed. There is a provision for two bolts to hold the
bottom of the DIC, although I have only found one in some of the panels
I have removed. The left one is easy to remove. The right one, if installed,
requires a long handle 10 mm wrench and quite a bit of patience. Or, you
can remove the CPS and the BCM, and then have easy access. There is an
8mm screw holding both these modules in, and 10 mm nuts on top to loosen.
Then unplug them and remove.
Once the bottom bolts are removed, the DIC will slide out. Move the gear
shift lever rearward as needed, and pull the DIC out far enough to access
the electrical connections on back, then unclip the connectors.
To remove the CD player, the back of the DIC has a hinged cover. Remove
the screws as needed to open the cover, then remove the four screws (
2 on each side) that hold in the CD player to the frame. Once the CD player
is loose, move it slightly to gain better access to the two electrical
connectors in the back of the CD, and then disconnect them. The CD player
will then slide out of the housing. The same procedure applies top 1990
through 1993 cassette players. Removing 1987 through 1989 cassette players
is more difficult. Remove a small rectangular snap-in panel from the door.
Then remove the door. There is a black plate behind the door with two
small screws that must be removed. Then the rear door of the DIC is opened
and other attaching screws are removed, and the cassette player will slide