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Ford 9N, 2N & 8N Discussion Board

4 terminal solenoid and wiring for starting...


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Posted by TRCTRMAN on March 16, 2006 at 05:50:31 from (208.226.210.206):

1949 Ford 8n, one wire alternator, non-standard three position key switch, automotive 12v 4 terminal solenoid, round four nipple 12 volt coil one connection.

I have the one wire alternator loop connected through ammeter, to battarey termnial side of solenoid, and into the battery connection of the key switch. From the S side of the solenoid I am connected to the starter side of the key swicth. From the I side of the solenoid I am connected to the igniiton side of the key switch. Also from this igniton side of the key switch I then connect to a two posiiton ressitor. On the other side of this resistor is the connection to the coil.

The question I have is should the I side of the solenoid be connected to the wire leading directly to the coil on the resistor? Wouldnt this allow at least 12 volts to the coil for starting and then once runnign the I side of the solenoid would no longer be feeding the coil but the coil would be fed through the ressitor to protect from overheating?

I understand the alternator puts out more than 12 volts and then goes through the key switch and then the resistor to reduce voltage as not to burn up the 12 volt coil. However, when starting don't I want that direct connection without resisitance to the coil for better sparkies? Then once I am done turning the key switch to the start position and it goes back to the on posiiton once started for running, the I side of the solenoid is no feeding the coil and I am feedign voltage through the resistor and key switch again to step down the voltage as not the burn up the coil? Is this correct?


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