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Awesome :clap: Are you going to install a coil with a ballast resistor? It would suck having to go through this ordeal again... not saying that the lack of a ballast resistor was the cause of the ICM failure but I think having one in the ignition circuit should be considered.
Yes I will. I'll get that one from eBay.
As of today, new coil, new distributor cap & rotor, new plugs and wires, got thermal paste on the new ICM, everything is as smooth as butter again.
Nice :grin: OOC are you using the factory tune? If you dial it in you'll gain some performance out of it.
Awesome! At least on my 89, the ICM was wired to the key switch side of the ballast, meaning it see's 12 volts. Hooking it to the 6-9 volt side of the ballast will up the current through the ICM, and I think that's what cooks them. Earlier trucks very well may be different, couldn't hurt to check the wiring diagram.
Anyone have a picture or diagram how that eBay coil is supposed to get wired up? I'm a visual kind of guy...
Here's a pic of mine, note I disassembled the mounting bracket and reassembled it with the resistor block on the other side of the coil, as that made for easier wire routing:
http://www.mightyram50.net/vbulletin...id=26921&stc=1
Thanks for the pic, that's super helpful!!!!