This is my novice attempt at installing an aftermarket subwoofer and amplifier into the 2009 Tacoma standard stock stereo. I have very little experience doing these kind of stuffs so this is by no means a professional job. It's just to show if a novice like me can do it in a few hours, then anyone can do it also.
Note: all pictures were taken with an iPhone so they are not great.
I purchased a TacoTunes Subwoofer enclosure 10" plus a Rockford Fosgate Prime R150-2 amplifier. I also bought an amp wiring kit and a Scosche line out converter (LOC).
First up is installing the TacoTunes subwoofer. This is probably the hardest part. You have to remove the plastic panel behind the driver side rear seat. And also you have to remove driver side rear seat in order to fit the subwoofer box into it's spot. Then you have to pry out three brackets (pictured below) that was welded into the truck back panel. Once all that is done, you can place the subwoofer behind the rear seat.
It was a b*tch to pry these suckers out.
The subwoofer sits too close to the back seat when it is folded down, even with the plastic removed from the back seat.
Closer look at the tight spacing.
But when the seat is upright, there's plenty of space inbetween.
In my opinion, the TacoTune subwoofer is too thick and the speaker driver actually rubs against the rear seat if the seat is foldeded down. So you can't really fold the seat all the way down, you can fold it down about 45 degrees and is fine. For this reason, you have remove the plastic on the back of the rear seat also. When the seat is in normal position, it is fine and it doesn't touch the speaker driver at all.
Back panel of the rear seat that was removed. I might cut the part that is in the way of the sub and later put this panel back in the seat. For now I'm keeping it off.
Next is the amplifier installation. I decided to mount it on the other side of the rear seat. This is pretty straight forward installation. Run the subwoofer speaker wires over to the amp and connect it in bridge mode as it is labeled on the amp, which is to the outer screws of the right and left channels. You can see where I connected the ground wire to the bolt on the back panel of the truck.
Run the remote wire (Blue) and the RCA cables (Dark Spiral Grey) from the amp to the stereo unit. I decided to run the wires on the passenger side of the tacoma, but you can run it on the right side if you want. Once you reach the front of the truck, run the wires behind the glove box and up through an opening to behind the stereo unit.
Picture of the wire connections.
I ran the wires along the side rails on the passenger side. This is the rear door.
This is the front passenger door.
The wires going nbetween the corner plastic panel.
And then behind the gloce compartment.
Next is run the red power (B+) wire from the battery to the amp's. There's a hole you can run through to reach from the engine to the interior behind the glove box. Then continue running it to the Amp.
Screw to the positive terminal of the battery.
Tie it along the edge of the hood.
Then down through an existing hole where the rubber plug is located.
Then through the firewall behind the glove box on the other side. And then run it along the side rails of the doors to the amp's power (B+) input.
Now you need to remove the stereo unit. Pry open from bottom temperature control panel. And then remove the bolts. After that, the whole head unit dash should be able to be pulled out. You should see the left harness (driver side) connected to the stereo unit. Remove it and locate all the wire colors grey, purple, pink, light green, and blue. Those are wires you need to tap into to connect amp and LOC.
Using these pastic wire tapping thing (I don't know what they are actually called , but here's what they look like:
You need to cut four strips of speakers wires about 8 inches each, they are for connecting (tapping) from the stock harness to the Scosche LOC. Just insert the wires into the wire tapping thing and press with a plier. I'm tapping just the front left and right speakers. So thats four wires plus the remote wire, so a total of five wires to tap into.
Here is where the speaker wires from the harness is connected to the LOC.
Here's how I tapped into the harness wires.
Just press the metal teeth in with a plier.
Connect the other end of the speaker wires to the LOC, keep in mind to connect Front Left +/- and Front Right +/- to the corresponding inputs on the Scosche LOC. Then connect the remote wire to the harness's thin grey wire. And lastly, connect the RCA cables to the Scosche LOC's Front Left and Right output.
Lastly, mount the amp by screwing it to the plastic behind the rear seat. Tidy all wires with plastic ties. And put back the stock unit into the dash. I hid the LOC to the right of the stock unit.
Play with the gain and amp settings while doing sound test to make sure it sounds good to your ears. That's it.
Oh who knows what is this next to the glove box?: