Cannot remove socket from "high" mount brake light
I cannot remove socket & bulb from the "high"
brake light mtd. in rear deck. The owner's manual is incorrect. The replacement bulbs
are Slyvania 921. Does this socket have to be
rotated or just pulled out??
Dealer told me bulbs may have melted
to housing, which I find hard to beleive.
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Open one of the rear doors of the LS. Position yourself on your knees in the back seat, facing the rear deck or rear dash.
Remove the cover from the high-mount brake light assembly, by hand. Pull the cover toward the front of the vehicle. Do not pull extremely hard, or you will break the clips that mount through the deck from the trunk.
Pull the old light bulbs out of the high-mount assembly. Wrap the new bulbs in a paper tower prior to picking them up. Insert new bulbs into the assembly, by hand. Do not touch the bulb lenses with your hands directly.
Install the high-mount cover onto the rear deck and push the cover toward the rear glass to lock it in place.
Remove the tail light assembly screws, then the assembly.
Disconnect the twist lock socket from the lens housing.
NOTE: To remove the bulb, turn the twist lock socket (at the rear of the housing) counterclockwise 1?4 turn, then remove the socket with the bulb; replace the bulb if defective.
Fig. 7: Remove the tail light assembly screws, then the assembly - wagon shown
Fig. 8: Twist the socket counterclockwise to remove from the housing
Fig. 9: This type of bulb simply can be pulled out of the socket for replacement
Attach the socket assemblies to the back of the lamp unit.
Install the lamp assembly to the vehicle with the mounting screws.
Remove the mounting nuts, then unplug the electrical harness to the lamp assembly.
The lamp now should come out.
Position the lamp assembly to the vehicle, then attach the electrical harness to the lamp.
Install the mounting nut, tighten to 62 inch lbs. (7 Nm).
Attach the lamp cover.
Fig. 10: Exploded view of the center high mount stop lamp assembly - wagon shown
Fig. 11: Light bulb application chart for all models with non-European headlamps
Fig. 12: Light bulb application chart for Buicks with European headlamps
Fig. 13: Light bulb application chart for Oldsmobiles with European headlamps
Disconnect the negative battery cable.
Fig. 5: Remove the trim panel fasteners - except wagon
Fig. 6: Carefully remove the trim panel - except wagon
Fig. 7: Pull the lamp assembly straight back and out of the opening
Remove the trim panel fasteners, then carefully remove the trim panel.
Remove the 2 retaining screws from the side of the lamp assembly, then pull the lamp assembly straight back and out of the opening.
Tilt the assembly downward for access to the sockets, then twist and remove the socket(s) from the lamp assembly. Replace the bulb(s), as necessary.
Installation is the reverse of removal.
Fig. 8: Tilt the assembly downward for access to the sockets
Fig. 9: Twist and remove the socket and bulb from the lamp assembly
Raise the liftgate, then remove the wedge blocks from each side of the liftgate assembly.
Remove the lower fasteners from the liftgate lower trim panel, by pushing in the center of each pin approximately 1?8 in. until it clicks, then remove the fastener.
Insert a screwdriver or small prybar into the hole in the lower trim panel (located near the wiper pivot on the pivot hump) so that the tool sits on top of the pivot. Lift up on the tool handle to disengage the trim panel upper clips, then remove the lower trim panel from the vehicle.
Unplug the high-mount brake light wiring harness.
Remove the brake light fasteners, then remove the lamp assembly from the liftgate.
To remove the bulb(s), push slightly on the top edge of the lens and rotate it away from the housing. Remove the bulb(s) from the housing.
In order to prevent the possibility of water leaks into the liftgate, inspect the lamp gasket for damage and replace, if necessary.
If removed, install the bulb(s) by inserting the bottom edge of the lens into the housing and snapping it into place.
Position the lamp into the liftgate and tighten the fasteners to 35 inch lbs. (4 Nm).
Connect the wiring harness to the lamp assembly.
Align the upper clips on the lower trim panel to the liftgate slots, then install the panel by pushing at the clip locations.
Reset the trim panel push-in fasteners by spreading the center pin tabs and moving the pin so that it sits approximately 1?4 in. out of the fastener. Insert the fasteners into the bottom of the trim panel and push the center pin until flush.
Install the liftgate wedge blocks.
Connect the negative battery cable and check for proper lamp operation.
Fig. 12: Removing the liftgate lower trim panel assembly - wagon
Fig. 13: Exploded view of the high-mount brake light bulb and lens assembly - wagon
The high mount brake light has its own fuse, so check that first. The high mount bulb is generally a stabdard type (there may be more than one bulb) or you can replace with an LED. As for the left rear bulbs not working when depressing brake pedal, check the bulbs again for any spring that may be broken. If the bulbs are still good, make sure there is sufficient contact with the socket. If still not working, have someone check it out further.
It will be either on the outside with 2 small screws or more likely you need to remove a trim/cover of the top headliner area... If still in doubt goto or phone the dealer and just ask the parts dept person to show it to you...
replace the bulb...??? This requires you remove the rear package deck (to access the bulb & socket). to do this, remove the seat bottom (two bolts hold the rear seat bottom to the chassis, then remove the bolts which hold the shoulder cushions (LH & RH - 12mm bolts) then remove the cosmetic molding around the trunk access (7 to 8 screws) then remove the "C" pillar covers (SRS curtain airbag LH & RH) to access the rear deck package & access the third brake lamp bulb. replace it, then reassemble.
If memory serves, there are two screws holding this light assy to the rear package deck. They are covered (LH and RH side of this assy). remove the covers and using a phillips screwdriver, remove the screws and lift the assy up and away from the rear glass. you now have access to the bulb and socket.