Hey pepz, i have an Apexi turbo timer that i want to install, iv brought the HKS Harness so it plugs into my ignition, but iv also got a O2 sensor signal wire, Engine Ecu ground wire and a hand brake wire that i need to hard-wire in, am i able to find these three wires by the steering column or fuse box to splice into or do i have to run wires to my ecu and splice them in where it plugs into ecu, there must be an easier way surely! I just don't know how, someone must know, i know the wire is white for the O2 sensor and brown for the ecu ground wire that plugs into ecu, so surely it must run through the fire wall under the dash somewhere? Do i need an oem meter cheer