Re: Ballast Resistor

Joined
Apr 9, 2003
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Ontario
I went through something like that with my 71 FJ40. It has an internal resistor in the coil. When I first got it running it would burn up the points within about 15 minutes (rough running, then backfiring, loss of power, then a sudden eerie silence). I was told to use a GM external resistor for trouble shooting, and that worked fine as a temporary measure.

I think any ballast that drops the voltage to around 8-10 volts across the points will do. Don't try running long without any resistor or you will burn your points, and they are rather annoying to change.
 
Joined
Oct 31, 2002
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1,501
Location
Kennett Square
here is a pic of the ballast resistor on my 73. I wasn't aware that the earlier coils had them built in...need to do some digging.
 
Joined
Mar 31, 2003
Messages
182
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Chattavegas, TN
For what it is worth;
My '67 has an external resistor.
Brog
 

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