I have posted this to help out anybody who is stuck on wiring an aftermarket amplifier into their i30. It will outline how to get a powerwire from your battery to the interior cabin. This has been done more recently with a 0AWG wire, so smaller gauges shouldn't be an issue
(Mods make this a sticky please?)
Take off your wheel at the side of the battery (driver side in your case) ?
(now this worked on mine, im a RHD but should be the same for yours providing everything is the same place)
anyways
Take left front wheel off, same side as battery. Undo all the wheel arch lining plastic. On the inside strip off the kick panels . all being well you will see where the wiring loom comes into the car. there is a black bit of plastic which sort of clips in. Pop it out, and you will see a spare grommet which leads to the wing/arch of the car.
If you run your power wire from the battery and down the side of the battery, you should be able to get it dangling down the wing. Think it slips under the tray, you'll see yourself. Just look for light from the wing.
From the outside of the car you will see the grommet which leads into the cabbin, at your foot well. If i remember correctly its at the top of the wing, near the place were it meats your sill.
Feed the wire through, and cable tie the power wire to the plastic tubing at the top of the arch, which holds the existing car wires. Once your wire is in the cabbin, you may have to cut some of the black plastic thing away to allow it to sit flush once the wire is in place.
Lift all your plastic trim from the carpet away and feed your wire
As you can see in the pictures, the wire comes down from behind the glove box.
EDIT: Found pics of when i done mine. I now have a 0 gauge wire running down the side of battery, not into the wing as pictured here with the 4 gauge
Grommet is at the more top end of the wing. apologies. power wire runs down the whole on the wing... see pictures:
Black conduit tubing is the power wire, not connected to the battery.
Power wire after coming through grommet
Grommet power wire goes through, poke a whole with a screwdriver, knitting needle etc. dont stab yourself!
if its not looking possible on your driver side (LHD) try the other side,
