Blue spark is good yellow is bad. This tells you nothing about your coil.

#1 concern to me is how this happened, driving along at 60 and motor died and has not started since, is that correct?

Most often that says a connection has failed...completely.

New cap and rotor are always a good place to start, just good maintenance for a fourteen year old.

If you are ordering online and have time to wait take the cap and rotor off and clean the contacts with 120 grit sand paper, slap it back together Hold the pedal all the way to the floor and crank it for a couple off seconds, this will clear extra fuel.

If this does not do anything check for 12v on the pink wirer to the IC.

Sudden shut down could be a broken tooth on distributor.

In all honesty someone telling me my alternator is over-volting is suspect. If that were true it is possible it ate the ICM

BTW coils almost never go, your problem is most likely someplace else, why was it changed two years ago?

 

Yellow spark is an indication the coil is weak in the secondary windings.

I have had many coils on my truck go while driving. It feels very much like a fuel pump dying. It dies all of a sudden. I have had 2 AC Delcos, one Standard, and one Accel quit on me. That is in a period of 10 years. I now carry a spare AC Delco with me as well as a ICM, crank sensor, LED light to test the ICM and a couple of spark plug wires and coil wire. I also have a trap door for my fuel pump. Call me paranoid, but when you are travelling to the bush in the middle of nowhere it helps to be prepared.

 

My book shows OHMS test for ignition coil 3 tests. They show a 4 prong coil connector Mine has 3 how do I test it?

I replaced the dist cap and button

I tested the triggering signal at the coil ignition module with an LED results were it lit up when connected and blinked when cranking the engine, was that good?

UPDATE here is what I got Analog meter OHMS

 

I'm getting spark to the distributor now, according to my spark plug tester, NO spark out of my new dist cap.
I removed new dist cap and bent the contact tab on the button up a little to make sure it had contact.

 

So you have good spark out of the coil, also out of the coil wire?

 

Wow, burned that is the worst luck I ever heard with coils, I should have said yellow spark is not an absolute that your coil is bad. Hunter I think you might have to pull the distributor and inspect it. Do not do that without reading the proper steps. There is plenty of info on here on what to do.

 

OK FIXED,

I was getting spark to the dist not good spark, not enough to feed through the dist.
I could not figure out how to test the coil properly so I took the coil and ICM to autozone they tested the ICM it was good, they could not test coil.

I told them I bought that coil from them 2 years ago he replaced it no charge lifetime warr.got home 3 min. later I was running.

To recap: Truck turned off at 60mph left with no start situation towed it home.The batt was real low pulled the alt autozone tested on the machine, FAILED voltage to high, possibly VR failure.Installed new ALT after they tested the new one, still no dice. I pulled the distributor cap it looked bad for 2 years old white scale looked like frost on the contacts, replace cap and button.

Still no start, weak spark from coil to dist. no spark out from dist.Installed new coil truck started. Thanks for the help provided.Back on the road.

 

Fantastic!

 

Knew it.
Had it happen enough times to me,