12 Volt Conversion

I'm converting my'46 to 12 volts and want to use the original wiring. I'm sort of stumped at the starter solenoid. The 12v has an "I" and a "S" lug on the solenoid. The 6v only has one lug. Am I right to connect the original wire to the "S" lug?
 
I ran into maybe the same problem. I switched starter button. I should have found the other style solinoid. I think the solinoid you have needs power FROM the button where the old style grounded the solinoid and it had a internal connection to the battery.
 
The "I" is for ignition and is the connection to the coil that applies full power from the battery during cranking. The "S" is to the starter switch. As Andy stated the original solenoid use a ground connection where as the newer style needs a power input. There are several ways to approach this. One is replace the ground starter button with a power button. I the 52 through 55 F1s used one . Another option is to use a relay to provide power to the starter solenoid (S) and use the existing starter button as the ground on the relay.

The 56 F100 wiring diagram show how they were wired (in 56 the starter was wired to the ignition switch and not a starter button).
 

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If you are interested this is the starter button that connects power to the starter relay as opposed to the early buttons that provided a ground. On the F1 Ford switched to the power style starter button in 52 and used it through 55.
 

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Agree with Koats, not voltage sensitive.
New old stock condensers arnt normally a good ting either, the do tend to have a shelf life, I think it's down to the guts (wax paper) braking down.
Martin.
 
Hi there, No such part as a 6 volt or 12 volt condenser. All automotive condensers are rated at 400 to 600 volts approx. What varies is the capacity which is around 0.22 mfd. (microfarads) to 0.36 mfd depending on the type of ignition system and the coil used. Early Ford V8 6 volt systems use a 0.36 mfd. condenser approx. Actually you can use any modern new automotive condenser in your early ford V8 be it 6 or 12 volt system. Depending on the capacity of that new condenser, will determine how long the distributer contacts will last. NOS condensers are a bit of a gamble as to wether or not they are any good. I once tested about 20 NOS model B ford condensers in their boxes. All were faulty. Regards, Kevin.
 
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