I had another thread because I thought it was the ballast resistor, but was informed my model didn't have one. I'll get back to this, but first I will explain everything I've done.

I have a 89 f-150, straight 6 2X4 that will not start. I drove it to Lowes and when I tried to leave it wouldn't start. It would catch, but never stay running. I went back to work on it two days later and it would turn over, but never fire even a little bit. That's how its been ever since, will not hit at all. Fuel pressure fine, compression fine. Will not even hit with ether. I finally narrowed it down to weak spark. It was orange. Things I've done:

Pulled codes:
21 Coolant Temp Sensor out of range
23 Throttle position sensor out of range
24 Intake air tem sensor out of range
32 EGR valve not seated; closed voltage low
67 Neutral Drive switch circuit open

Replaced:
Plugs
Wires
Rotor button/distributor cap
Distributor itself
Coil
EGR Valve
Throttle Position Sensor
Intake Air Temp sensor
Coolant Temp Sensor
Replaced batt terminals
Cleaned grounds on either side of radiator and by drivers side cab

None of this has helped. I used Haynes manual to trouble shoot. Under the Primary circuit continuity check section I ran into problems. 17. says to check from coil harness connector terminal TACH to module pin 2. Unless I'm reading this meter wrong, it said 1.2 M. under 18.it wants you to check between tach to ground. I guess I had done this before and came up with 4230, and it's supposed to be 10000+. I checked resistance between tach (green/yllow) and the harness at the firewall and got 22k! between the harness and the cab of the truck was like 4 ohms. So decided there must be a short and bypassed from the tach side of coil to that harness. Nothing. In fact, the resistance between tach and pin2 was now 2.03 M (I'm guessing that's megaohm, which means bad), and when I try the other test, I get infinite. I'm not sure if the test was done correctly the first time, all I know is that i had written the 4230 at some point during all this. I traced the wire from pin 2 and this is where it got complicated. The wire is the same color as the tach and it led to a piece of shielding where i assumed they were just splice. However, at the other end of the shielding, the green tach wire, and some red with weird blue spots on it came out.

I cut back the shielding and see that the two are spliced into the red, but also that a green/ylw is connected at the splice with a resistor in it. Low and behold, the shielding says 1800 ohms 1/2W, 22k 1/2 W. I'm assuming that this is why i was getting the 22k resistance. In the schematics, some of the wires are wrong colored, but for this spot it looks ok. It looks like this must be the ignition suppression resistor. What in the world is that? 22k is a hell of a lot. It's a lot more than a ballast resistor. There is no indication of the red/blue wire on hte schematics. What is the red/blue wires function? or the green one for that matter? I thought it was just the neg side of the coil. And what is the cause of no reading at all for the tach/ground test?

I'm very confused and frustrated. Does this all come down to a ground? I have attached some pics for clarity.

004_zps8a07e22b.jpg Photo by woodardpatrick | Photobucket

005_zpsd3f990de.jpg Photo by woodardpatrick | Photobucket

003_zps455b9d20.jpg Photo by woodardpatrick | Photobucket

006_zpsa6995a03.jpg Photo by woodardpatrick | Photobucket

007_zps95c8230e.jpg Photo by woodardpatrick | Photobucket