_Shane_ Posted June 8, 2011 Share Posted June 8, 2011 Hi Lads, Anyone on here fit an apexi pencil turbo timer to their supra and if so how did you get on with the wiring ? I bought a hks harness and this is fitted etc I have 3 wires coming from the turbo timer box that i do not know where they go We used one as an earth and when the ignition is on the turbo timer would light up and then go off after 2-3 seconds, my friend checked online and said an earth from the turbo timer must go to the ground on the ecu in the car, is this correct ???? Thanks Shane Quote Link to comment Share on other sites More sharing options...
forker.jon Posted June 8, 2011 Share Posted June 8, 2011 the grey and red have to be connected to the hand break the black with brown goes to the o2 cable on the ecu (down where your feet are in the passenger side) dont remember a third cable hope that helps Quote Link to comment Share on other sites More sharing options...
_Shane_ Posted June 8, 2011 Author Share Posted June 8, 2011 my mate is telling me the ground must go to the ground of the ecu and not just an earth on the car etc Quote Link to comment Share on other sites More sharing options...
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