Coil.

Speedfreak

Active Member
I really hope this isn’t a stupid question, however here we go -1973 to thousand SC. I am looking to replace my ignition coil, now I don’t know whether I have a system that has ballast resistance in it or not. I have read some historical comments on here, about measuring the voltage to find out,however my question is do I put a meter across the positive and negative terminal on the coil with ignition on, or do I remove the wires that provide the power to the coil and take the reading from there with the ignition on? Quite simply earlier on I did it with the wires disconnected and I seem to be getting 12 volts, however when the wires were connected to the coil the voltage dropped to about seven volts. As I said I really hope it’s not a stupid question, thanks in advance for your help, Steve.
 
Never a Stupid Question has ever been asked or posted on this forum we are all learning including me and my knowledge only of this is sometimes its printed on the coil Ballast
 
Most likely a ballasted system of still original. Easy to find out. Pull both low tension wires on the coil and measure the resistance between the low tension terminals. 3 ohms suggests no ballast resister 1.5 ohms suggests a ballasted system.
 
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