Okay, so I went and worked on the truck and did the following:

Connected multi meter to ignition side of ballast resistor and engine ground.
Turned ignition on and read 11.95 volts.

Connected multi meter onto the ballast resistor terminals with ignition off and read
1.50 ohms resistance (resistor was warm from cranking engine earlier)

Found link here https://m.youtube.com/#/watch?v=PSiw4thM21k and tested coil by connecting multi meter to negative terminal on coil a to engine ground. With the ignition on the meter only read 1.6 volts, not 12 as mentioned. What does this mean, bad coil? I test primary and secondary windings on coil and they were good. Wire connections seem to check out as per diagram provided in previous post.