For my 1jz swap im running ignition switched 12v directly to the fuel pump.

Can anyone tell me where the power (black with white stripe) wire on the fuel pump traces back to so I don't have to run a new wire etc

thanks!

 

Download the wiring diagrams (link in FAQ) and get familiar with them. The opening pages explain what all the symbols mean.

As for your question, the wire comes from is the circuit opening relay, which I believe is located under the dash (I've never had to mess with one). That relay is triggered by the key in the "start" position, or by a ground from the factory airflow meter. If you are doing a swap, find the fuel pump trigger (preferably ground) for whatever ECU you are using and you can use that in place of the factory AFM trigger. One easier place to tap into is a brown wire on connector FEM-02 for the series 4 cars. FEM-02 is down where the stock ECU was located under the passenger dash.

 

Got it, it works now thankyou!