The pump wire runs along the n/s side sill, the wire the other side(o/s) that is the same colour!!, is the brake light wire.
Diy is easy just you need to chop about the last 6" or so off the old wires to re use the connectors, don't forget to run a new earth from the BATTERY also as this going to have some resistance in it as well, don't forget the fuse at the battery on the live either, I fitted my relay behind the seat upright on the n/s as ther eis already a nice 8mm hole there so used that to hold a relay holder, relay plugs in there, so can take out when at shows etc for a bit of extra security.
tabetha