some wiring questions

[sx240z]

Hi guys, I have some concerns about wiring my fuel pump safety switch. I have a 73z and the switch is from mr.gasket #7872. The safety switch has three teminals: to ignition, to fuel pump, to starter relay.

 

In the jtr manual I'm kinda confused on which wires to use. They say the easiest way is to wire the green-white wire to the fuel pump wiring. So does that go to the ignition side of the terminal on the switch? Also jtr says to splice the black/white to the bat terminal and this goes to the switch. Which one do I use? And do I still need to splice into the black/yellow solenoid wire on the starter?

 

Also, where can I pull 12v for my electric choke? Thanks!

 

Jason

[Guest heinera]

It depends how you want it to work. This is the way i wired it and I feel is the best way.

 

The fuel pump safety switch is actually a switch turned on by oil pressure. I wired one 12 volt (hot with key on) wire to one of the opposite terminals. To the other opposite terminal I put a wire to the (+) side of the fuel pump. Actually to a relay to the fuel pump. I grounded the (-) side of the fuel pump.

 

This setup provides power to the fuel pump any time there is engine oil pressure with the key turned on. I did not wire the 3rd post (middle post)on the switch, but you could run it to a dash warning light if you want for low oil pressure.

 

I also wired a separate pushbutton to the fuel pump relay with a 12v always hot wire. I push this button as needed to prime the carb before starting/or while starting. But it is hardly ever needed. Usually there is enough fuel in the float bowl of the carb to start.

 

I don't know which stock wires you need to connect, as I rewired the whole car with a painless kit.

 

Also, you can use any 12v (hot with key on) wire to the electric choke.