2N resistor

Mark L 2N

Member

Checking to see if I got have this correct. A while back in an emergency I jumped the open resistor on my 2N to get a few post holes drilled. Ordered a resistor from Yesterday's Tractors and forgot about it. Today the tractor just died and suddenly my memory came back with a DAMN! I towed it to the barn, installed new plugs, points, and condenser and then the new resistor. The tractor fires right up but when I went to check my voltages I have 6 volts on the coil all the time the ignition is on. I checked the resistor, it has 6 volts in and out. Shouldn't it be lower? Is it adjustable?

Thanks,
Mark
 
"resistor" covers a lot of ground. Could be any resistance. Depends on what you got. Is it the oem ballast resistor? If it is, measure it. Should be .3 ohms cold.

Turn the key on and check voltage at the coil. Should be battery voltage if the points are open, 4-ish if closed.
75 Tips
 
Thanks Bruce,

In 10 plus years I've had this 2n this is the first time I pulled the distributor off. It's a simple rig but I am not all that familiar with the wiring on it. I ASSumed the ballast resistor lowered the voltage to the coil. Wrong?



Mark
 
(quoted from post at 15:33:26 06/26/17) Thanks Bruce,

In 10 plus years I've had this 2n this is the first time I pulled the distributor off. It's a simple rig but I am not all that familiar with the wiring on it. I ASSumed the ballast resistor lowered the voltage to the coil. Wrong? Mark

A resistor will only lower voltage when current is flowing. The test has to be performed with the points closed (as Bruce posted) which completes the circuit.
 
Thanks
I got the thing from YT and the bag says 9N/2N, (it also says made in Taiwan). I suspect the I am ok, can't prove it. It mounts the same but does not have the same size core and number of windings as the cooked one I pulled out.

I will go out later and pull a wire off to check the resistance. Just don't want to have to tear off and go thru the distributor again real soon.

Mark
 
With only the feed wire connected to it I still get 6 volts out the other side so at least it's not feed back from some other wiring issue.

My cheap VOM with a fresh battery shows .2 ohms probe to probe, I measure .5 across the resistor.

Guess we'll run it.
 
You could do that. Or push in on the belt & turn the fan. That should move the crank pulley enough to close the points.
 
(quoted from post at 21:40:33 06/26/17) You could do that. Or push in on the belt & turn the fan. That should move the crank pulley enough to close the points.
r put it in high gear & grab those big rubber treads & rock it a bit.
 
Mark........I worked in the Boeing Flt Test Calibration Lab and measureing low value resistance as you are proposing to due is DIFFICULT to say the least. Howsomevers, a voltmeter is plenty accurate to measure the resultant voltage drop caused by the infamous ballast resistor. Number of windings is inmaterial. Just measure the volts. When the points are OPEN, you shuld read battery volts. 'cuz you have an incomplete circuit. When the points are CLOSED, you shuld read about 1/2 the battery volts caused by the ballast resistor and coil. Simple, eh? I've had ballast resistors labled "made in Turkey." so Tiawan don't mean 'nuttin'........HTH, the amazed Dell
 

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