Water intercooler button wiring
 

I have a auto intercooler spray switch I would like to use ,but I don't have the wiring for the back and there is 4 pins !!!!
1 will be light as it lights up
1 will be earth
1 will be + in
1 will be + out

Can anyone help which is which

Thanks guys

It wont do anything if you dont have the control unit to make it work. The sti intercooler auto spray is controlled by the ECU. It is triggered by intake temperature and boost pressure.

There are aftermarket boost triggered systems available, you may need one of these.

Good luck.

That's what I thought ,but then got told no it was in the switch ,,depending on modal car