It might be good if Josh hosted the pics? That way if they are deleted from my site then people can still see what to do.
1) Peel back the passenger footwell carpet and insulation from the bulkhead. You should see something like the following (minus screwdriver!!):
poke a screwdriver through one of the grommits (gently) so you push it out from the bulkhead. Go round to the engine bay and you should see it coming out like this:
Poke a wire through from the footwell, pull this into the engine bay and then tape up the beefy amp wire, then pull it back through:
Sorted. I needed a dedicated head unit supply too, but this is simple to do once you have the route from the battery sorted out.
Next, pull off the door seals and route the power wire (and remote lead, and sometimes a sub controller) down this to the B-pillar:
The most difficult bit is routing the wires from the b-pillar to the boot. It has to go behind the trim, so wedge it open by the rear seats:
then tape the wires to a straight rod (I used a snooker cue?!) and push it through to the wedged-open opening. Thread the wires under the seat to the boot. Hey presto! Do the same for the RCA wires from the head unit (they are easy to route from the head unit to the A-pillar, then it's just a case of repeating the door route like above) and wire up the amp and sub.
I earthed the sub near the boot light earth point, the left of the image is the boot opening, and the top is where the light is (on the LHS of the boot in the 6N):
With the head unit, the only wire I used from the previous head unit connector was the brown/red wire - the switched power supply. The earth and power supply I routed myself. BTW, the red wire is the constant supply and the brown wire is the earth.
This should be fairly simple, but it still took me 2 hours to wire everything in properly and get it set up. I think this guide may be pretty universal, but don't quote me on the wire colours!
o well)
ive routed the rest of the cable easy enough, just this bit I cant do.