91 blaz Lt Spark Controller???

I don't get spark. Replaced sprk controller (mod) runs for a month than same prob. I have replaced the complete distributor same thing ran for a month
then would not start if i replace spark controller with one from the wreckers
it gives me a month i only have one left must solve problem.also when i first replace it. It will start right up four are five times than it becomes more delayed. I have ran a ground wire to the distr on the last attempt as a hailmary any ideas?? sure would be apreciated

Could be a few things. did you check the circuit for the module to make sure it is getting the proper voltage (not low or high voltage)? Do you install the module properly, they need to be installed with silicone lube on the bottom of them or they will overheat and burn out.

Silicone yes ,voltage no. I am not sure of which one of the five? wires that should be getting 12v , are if there is more than one. I am heading outside now with the meter. Will be back with more Info.....
THANK YOU

two wires on one plug wht 11.3v pink 11.3v four wires on second plug
wht 0.7v purp 0v tan 0v blk 1.0v I didn't find any grounds. When i connect them to the module i get 10v on both prongs (distrb side). please note voltages might be a little lower than normal from cranking over. batt reads 12.5 with acc on. There is power but is it right ? I don't have a clue.
Maby i'm missing something. truck looses spark changed cap wires..ect..complete dist, coil even changed ignition.

I have to look at the wiring diagrams for this before I can comment. I will post as soon as I can, or if course someone can come up with the information quicker than I can, by all means....

Thank You Blazes9395. I found the problem was in the connector. I started to notice power loss on the meter. And when i fiddled a bit more with the wires power would return. That explains the ghostly symptoms. I can't belive
i was foiled by a loose wire, Although it had to be just so to lose power this would explain why it would work after i changed it. THANKS Again

Happy to have helped. :)