you need to run the grey wire from the harness to the handbrake which in mine was tiny u need to wire it in to probably more wire first before you can run it to the handbrake. you then need to create a circuit with the hand brake. ie join them together you can do this by clamping both wires together creating a circuit, u can get tiny wee blue wire connecters at places like B & Q and homebase did the job perfect for me and for the turbo timer to work u need to hav the handbrake Applied this will sound like a proper mind fuk but ill try get photos up for u tomorrow make it easier for u to follow wire connecters:---- is this the turbo timer u hav?