Check out this site: https://www.allpar.com/forums/topic/40994-ballast-resistor/
Seems to be some debate as to whether or not your car even has a ballast resistor, and if it does, where it may be located. I've always seen ballast resistors mounted on the firewall away from the engine's heat...but those were on older models (50's, 60's 70's). Good luck.
Testimonial: "the information on the allpar forum was informative however i dont think its the ballast resistor that's giving me the issue because the car wont even run due to no spark. the only thing i can think of now is that there has to be a bad ground somewhere. I'll let you know if i come up with anything. Thanks for your help!"
SOURCE: trouble shooting on chevy s-10 2.8 liter v6 pick up truck
sounds like the ground strap to me, it wouldn't be that the wires are in the wrong order that would still give you spark just to the wrong cylinder and believe me you'd know immediatly in that case.
No spark means no contact to the coil plain and simple..
SOURCE: 1991 honda accord "no spark"
There is a relay mounted way up under the dash on the driver side. It
is about 1"x1"x2" and it says Mitsuba on it. This is the PGMFI relay,
sometimes called the main relay or fuel injection relay. It is very likely the problem. You can buy another one, or there was a bulletin on how to repair it. You need to take it out, pop the cover off, and resolder the cracked solder joints on the pc board that the relays are mounted on. Really not that hard if you have a little soldering experience. If not, just buy another one, about 50 bucks.
SOURCE: 1990 Chevy Silverado Pick-up. No spark from the plugs.
How about the MAP SENSOR? Do you check it out?
SOURCE: 1990 Jeep YJ 6 cyc. Won't Start---No Spark From Coil
It would be great if you could find the Ignition Control Module!!! From my experience on my Jeep...90 YJ 4.2 liter carb. it does not have one...Computer controlled only...
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