Electrical Question on Fuel Pump (with LPG conversation) 4.5 L Petrol

[liddell]

Hi all,
my 80 1fzfe (think that is right) 4.5L Petrol 80 series with LPG Conversation.

I'm pretty sure that the fuel pump is always under load, even when on lpg side through switch.
I want to locate the fuel pump wiring so I can separate and place with a relay on that line, so the fuel pump also stops when on LPG side.

Does anyone know the best location to locate these wires, colours etc to do this?

The first set of wires at the back of fuel tank, don't appear to be the correct ones, I've just found some wires on the left side of vehicle (opposite to steering being in Australia) not sure if that makes a difference at all. Any help would be much appreciated

 

[thelal]

Is this a US model and what kind of LPG system do you have?

 

[bahamasair]

A lot of LPG conversions leave the fuel pump running to circulate the gas so it doesn't varnish up by sitting in the lines for long periods of time.