Quote:
Originally Posted by ldj1002
OK, I didn't make myself clear. If I have a coil and all it says is 12v or nothing, How can I check it to determine if I use it on a 12v as is or put a resistor in line?
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Read across the primary posts with an ohm meter. If it reads about 3 ohms, you can use it on a 12 volt car without an external resistor. If it reads about 1.5 ohms, you need an external resistor.