2nd relay that switches the 9v and 12v circuit control by the ground pin off the Hobbs switch
Both relays are energise by the fuel pump fuse .
I used a fuse tap with 2 amp fuse tap on it and then it feeds in and splits in to 2 x 30 amp diode to feed both relay.the diodes will prevent back feed back in to the fuse box incase it all goes wrong