Trunk access from behind the seats

Fuel pump access

Most passenger cars can access the trunk by taking out the rear seat.

Why are your battery cables off? Does the trunk have a key lock? With some makes and models, the rear seat back will fold down, allowing access to the trunk. If not, you may be able to remove rear seat back then see if you can access the trunk.

If the trunk release is electric, have to check wiring circuit and applicable fuse.

What is model year, I'll try to look up trunk release wiring circuit.

its in the trunk area over the wheel. you have to remove the trunk liner panel and then you can access the strut mounting bolts

Put a battery charger on the starter solenoid terminal
& a good ground,charge the battery then open trunk
& replace the battery

Yes there is access to the trunk from the rear seat but the bad news is the release for the seats is in the trunk on the top passenger side of the trunk.

yes you can no problem their but you may have to cut the back of the seat away ,the metal behind the seat i mean to get enough space to open it with a screwdriver ,what about a a pair of pliers on the remote pull cable ??

cant find what?

Have you looked under the drivers seat ---I've had a few toyota's with them there --Stock GM though for some reason put some engine computers there too ---don't get them confused ---since you
may find both under there ---Most MR 2's had this and the computer in the rear trunk in front of the
liner --nice set-up too high and dry ---but if you got in 12" of water --well forget the stereo til it dries out --lol keep your sense of humor and repost with what kind of car ---Hawk

have you verified that sound is comming from radio. Start from the begining. Splice the wire from the radio check that audio is comming from the unit. Then check to see if you have a factory pre amp in the trunk or hidden under a seat or something like that. If all the electical parts are good just run new wire, its a lot faster than tracking down a crimp or break in the wire.

THIS IS ASUMING YOU HAVE ALREADY VERIFIED THAT THE SPEAKER ACTUALLY WORKS, YOU HAVE DONE THIS RIGHT.