For the oil pressure switch. Looks like it's just a 12v wire for the dummy light going to a grounding switch on the block. Is that correct?
Just so you know folks Stewart Warner has a oil pressure Hobbs switch that is adjustable. This can be a real engine saver on a race motor when wired into your ingition system along with a over ride switch. You Tee fitting it in where your idiot light switch is and and set it for no less then 20 psi or whatever higher amount you want. The over ride switch is needed to start the motor. This switch also makes for a anti theft device!
