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Old 03-06-17, 13:22
Bruce Parker (RIP) Bruce Parker (RIP) is offline
GM Fox I
 
Join Date: Feb 2003
Location: SW Ontario, Canada
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Default 12V GM Coil

Another dumb question. I went to my local UAP auto parts store to get a 12V coil for a GMC electrical system. First thing the guys asks is "internal or external resistor?". I've only ever bought just plain 'coils' and have been been using my stash so this is the first new one I've needed in quite some time.

There is no resistor in a GM ignition circuit, so it follows I need the one with the internal resistor? Or maybe the one without? Did my old old 'regular' coils have a built in resistor?
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Old 03-06-17, 15:00
Frank v R's Avatar
Frank v R Frank v R is offline
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Default Coil

Bruce I have WW 2 GM 12 volt coils NOS,
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Old 15-06-17, 02:48
Bruce Parker (RIP) Bruce Parker (RIP) is offline
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I answered my own question. If using a made in Mexico UAP 12 volt coil get the one that says "for use with external resistor". This means there is no resistor within the coil and you get a regular coil. The one with the the internal resistor doesn't pump out enough current to fire a 12V Delco Remy distributor.
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