You could do this with a 4 or 5 pin relay.
I'm assuming that you want to be able to switch the fuel pump off (hidden switch for security?)
If you were going to use the 5 pin, what is the purpose of the link between pin 86 and 87? All that does when the relay is active is feed the power back to pin 30.
Last edited by SeriesLandy : 16th November 2014 at 01:14 PM.
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