'vintage' push button ignition wiring help needed..

[isb cornbinder]

I have an old two (key) position 3 wire/terminal ignition switch AND a push button to actually crank the engine.

Back of the ign switch is marked acc, coil, amm (old).

Currently with *no wires* running to the ign switch, or connected in any way, the push button will crank the engine.

The push button has two wires that both run straight to the starter... one to the larger post that the pos battery cable runs to, and one wire to one of the smaller terminals.

What I am after is cranking/starting only when the key is turned AND the button is pressed!

My take is one of the wires running to the push button needs to be cut, and the resulting two ends run to different terminals on the ignition switch.

I am fuzzy as to which terminals... a two position/3 terminal switch is a bit of an (old) odd duck it seems so any diagrams I bring up don't quite mesh, and the labeling terminology is different... I am not sure what equates to what.

Any guidance appreciated...




ps I am fairly sure currently although it will crank without the key turned, it will not start without it turned (spark).

You do not need to get power from the positive terminal on the starter. That wire can be connected to the run or coil terminal on the key switch.
Just for fun, I am attaching a picture of the dashboard from my 1940 Ford. I decided to use a push-button start. My pushbutton switch is a one-wire that gets grounded through the button. I will not add to the confusion by detailing this.

 

[BillK]

No damp environment in the time I had the kit. The local hotrod shop where I bought this wire kit has dropped Painful from their inventory. This shop carries Ron Francis and American Autowire, now. They had other customer complaints like mine.

Interesting. Maybe something has happened recently with their supplies. Its been about 2 years since I did the last one.

 

[isb cornbinder]

Interesting. Maybe something has happened recently with their supplies. Its been about 2 years since I did the last one.

My experience with Painful was about 10 years ago. The green corrosion continues, albeit slowly. I may cut the PP wiring out and start over with one of the other brands. I like Ron Francis.

 

[slowtwitch73]

What causes the green corrosion, and how do you prevent it?

The stock USA wiring in the Willys was rife with it... and it all still worked lol.

 

[Wrench97]

Ron Francis is local to me, I do like his kits.

 

[captaindiode]

My Ferguson tractor is wired the same way. The push button will turn the starter anytime the tractor is in neutral, but it will not start unless the key is in the ignition position. Wire the AMM terminal to a constant 12V, and the coil + to the ignition terminal. No start unless the ignition is on.