62 ford starter solenoid ??????

M

mikhett

Senior Member
What will happen if the small wire terminals S and I are crossed(mis wired)? what would the symptoms be? Thanks
 
There is only ONE wire on the I term .It comes from the C term on the ignition switch.How does the coil get 12 if it doesn't pick it up off theI term at the starter solenoid? I know there is a wire that branches off like a Y after going thru the pink resistance wire that goes to the coil but that voltage is reduced to 9 volts so as to not burn up the points.IM CONFUSED!
 
mikhett said:
What will happen if the small wire terminals S and I are crossed(mis wired)? what would the symptoms be? Thanks
Click to expand...
V8 Bob said:
The engine will start cranking when the ignition is switched to the on position.
Click to expand...
The other end of the 'I' wire is connected directly to the '+' side of the coil, after the ign resistor and will have approx 9 volts on it at it's solenoid end when the key switch is in the 'run' position.
If the 'I' wire were mis-placed on the 'S' terminal of the solenoid and the ign key turned to the 'run' position it could/would energize the solenoid & starter, the engine would run and the starter would spin until the key was turned off.

Automatic transmission? The neutral safety switch would be bypassed as a result of the incorrect solenoid wiring, and ineffective.

If the approx 9v ignition 'run' voltage is insufficient to energize the solenoid it would not click, or operate the starter.
Turning the ign key to the 'start' position would also not energize the starter solenoid as the 12v power from the key switch (and NSS) on the correct 'S' wire would be mistakenly on the 'I' terminal and not connected to the electromagnet coil inside the solenoid (via the 'S' terminal).

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mikhett said:
There is only ONE wire on the I term .It comes from the C term on the ignition switch.How does the coil get 12 if it doesn't pick it up off theI term at the starter solenoid? I know there is a wire that branches off like a Y after going thru the pink resistance wire that goes to the coil but that voltage is reduced to 9 volts so as to not burn up the points.IM CONFUSED!
Click to expand...
The 'run' position of the Ign key switch sends 12v power to the ballast resistor (or resistance wire) which then feeds the '+' side of the coil with 9v.
The 'start' position of the ign key switch sends 12v power thru the NSS if the car is an automatic, to the 'S' terminal on the solenoid. This energizes the solenoid, the starter, and the 'I' terminal on the solenoid with 12v.

The other end of the wire on the 'I' terminal of the solenoid takes that 12v to a connection for the '+' side of the coil for starting. This connection can be a second wire on the '+' ign coil terminal, or the Y connection you're seeing on the ign coil side of your resistance wire / ballast resistor.

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mikhett said:
THANKS!MR DMSFRR!YOU CERTAINLY cleared that up.
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My '55 was mostly converted to 12v by a previous owner, but missing the NSS, ballast resistor and wiring to them. I got that fixed but haven't been able to finish the rebuilt engine installation, so I have to do something... :rolleyes:
 
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