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It is mounted next to the driver side rear speaker. if you pull your forward trunk panel off you see it.
You will have to remove all trim that surrounds the speaker enclosure. Then remove the panel that houses the speaker. The speaker is removed from the rear side of this panel.
Its on the rear passenger side mounted to speaker box
You have to remove the rear seats to be able to remove the rear side panels. Then you have to disconnect the wires to the speaker, unscrew the speaker, then reinstall the new one.
The 1989 Toyota Corolla Weygand rear speakers can be found in the side compartments of the rear of the vehicle. There will be a speaker on each side.
Hm.
4.5"
behind the rear tire on the drivers side under the mud flap
Under the rear passenger seat on the driver side.
most usually there was a dealer kit that replaces the factory rear side storage box doors to install rear speakers , although only in xtra-cab pickups.
Rear speakersFor the extended cab use a Philips screw driver and remove the speaker from the side wall above the jump seat. Disconnect the speaker wires ... and be sure to recognize / mark the negative wire. Unscrew the speaker from the case, screw on new speaker, reconnect the wires to the correct terminal and screw back onto the side wall.
I assume you asking about the speaker amps. There is one in each speaker box. One in each door and one on each side in the rear.