Anonymous-0

Well-known Member
I have a 600 ford that has been changed over to 12 volt system it has a resistor on it what side of the coil would the wire running from the resistor to the coil connect to on the coil minus- or the plus+ side. Thanks for any information.
 
Being that is is now 12 volts it should be a - ground system so the resister should go on the + side of the coil which should then go to the ignition switch
 
Roger,

I agree with Royce. A resistor in series with an inductor is going to drop the same amount of voltage regardless of whether it's on the plus or minus side of the coil.

Either side. Usually on the plus side.

Tom in TN
 
for arguments sake.. the side of the coil to the dizzy should match the ground polarity. thus - to points if neg grnd, and thus the resistor up front of it.

it will rum witht he + side of the coil hooked to dizzy too.. as said.

lastly.

why not ditch the old coil and resistor and get a napaic14sb.. or at least plan for it if the coi or resistor ever fails.. THEN upgrade..e tc.
 
Yes, as far as coil current it makes no difference.

The difference is in polarity of the spark. If coil is connected to match battery ground the plug will "spit" the spark from center electrode to ground tab. If coil is connected opposite of battery ground the plug will "suck" the spark from grounded electrode to center. The plug is more efficient when it "spits" the spark.

I have seen several instances where tractor's first start up in the morning, even in summer time, was much quicker with coil connected to match battery ground.
 

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