1951 F1 Starter Button
Fleet Mechanic
Joined: Aug 2010
Posts: 1,994
Likes: 3
From: Morgan Hill, CA
I'm in the same boat you are in. I converted my dads 46 truck to 12 volt. It has a new 2 post solenoid on it. Im leaving the push button on it and need to know where it goes to. This is the second go around. I have a 12 volt generator on it and its not charging right. I had it checked once and it was good, so know Im trying to figure this wiring out. My gen and voltage reg is hooked up right and the truck starts fine, it just willnt charge.
Since you have converted the solenoid, you may want to head to Napa and get a new switch that has two terminals on it (technically that is called a single pole single throw - normally open switch)....hook one to a battery source (use a fuse at the source), and the other to the left side of the two small terminals on the solenoid...that will provide 12v to that terminal when you push the button and will cause the starter to crank. The key switch (as someone else said) only controls power to the coil...and it has to be "ON" for the engine to start. And....the starter will crank the engine even if the key is turned "OFF", so be careful there. (a candidate button switch at Napa would be an Echlin PP5006...maybe).
Dan
Elder User
Joined: Nov 2004
Posts: 874
Likes: 0
From: Ashland, KY
Thanks for the info on this. It is 12 volt neg ground and I did polverize the voltage reg. As for the switch I'll have to check the back of it. We are going to work on the truck tomorrow so I'll let you guys know if we get it fixed. Its been awhile since I have done this and its about to drive me nuts. Thanks again for the help, Scott
Senior User
Joined: Feb 2010
Posts: 182
Likes: 0
From: southern MN
Try these. They've been posted before plenty of times, a simple search should have found them.
These may be helpful too, also posted plenty before
Good luck, and remember, the search function is your friend
These may be helpful too, also posted plenty before
Good luck, and remember, the search function is your friend
Fleet Mechanic
Joined: Aug 2010
Posts: 1,994
Likes: 3
From: Morgan Hill, CA
The 12V diagrams are OK, but all three of them have an error....the wire from the "I" lead on the starter solenoid should go directly to the coil "+" terminal. It is supposed to be a momentary circuit that bypasses the ballast resistor. As shown, the current from the "I" terminal would be routed through the ballast resistor...it won't hurt anything, but the design is supposed to provide a momentary full 12 volts to the coil for a hotter spark during starting.
Dan
Dan
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