I need some help wiring up a 1950 F1 ignition switch. I searched the forum trying to find some info but didn't see anything in regards to my question.

I'm rewiring my buddy's truck with an EZ Wiring harness and I'm trying to figure out how to connect the ignition switch to the wiring. The truck is running a 12 v negative ground system. The EZ manual shows a 4 post ignition switch, but the factory F1 ignition switch is only 3 post and I have the push button starter button as well (updated to work with the new electrical system).

The EZ instructions state to connect the wires in the following manner:

IGN SW Power wire --> Bat terminal
IGN SW Start --> ST terminal
IGN SW Acc --> Acc terminal
IGN SW Coil & IGN SW IGN --> IGN terminal

The back of the factory ignition switch has three terminals labeled:

Coil terminal
GA RAD terminal
AM terminal

How do I wire the IGN wires from the EZ harness to the stock 3 post ingnition switch????
Help!!!

 

EZ wiring .................................................. ........... factory ignition switch

IGN SW Power wire --> Bat terminal ......................................(hot 12 v.) GA RAD terminal (just guessing)
IGN SW Start --> ST terminal ...................................This is for the starter and goes to the push button. See note.
IGN SW Acc --> Acc terminal ..........................AM terminal (just guessing)
IGN SW Coil & IGN SW IGN --> IGN terminal ...............................Coil terminal

Note;
The EZ wire will probably use a 12 volt two wire push button and hot activated solenoid, the 6 volt stock one used a one wire grounded push button and a ground activated solenoid.

The two "just guessing" might need to be reversed.

The 48-50 switch is not available new to the best of my knowledge.

 

Thank you Old F1. I appreciate your input. This is my first rewire of a classic vehicle and I was a bit lost on this.

 

Your push button switch has to be a two prong momentary to prompt the starter. Old ford was correct about that. The rest I'm not sure. The original switch did ground out to complete the circut, but that won't work with what you're trying to do. Hope that helps.

 

Check, I do have a two prong momentary switch for the starter button. I had read some other posts in the past stating the functionality of the original starter button so I made sure to get a correct two prong.

thank you,

 

edited the post with bold and color

 

Mtflat, got it. Thank you!