[95 S_Trucker]

Check for power at pin D directly at an ignition coil(at the 4 pin connector, not the 8 pin)(use a test light between the pin and the negative battery terminal)

Do you have power? If you do, check for ground at pin A(use a test light between between the pin and the positive battery terminal)

There is a ground that bolts to the engine block on the drivers side, about an inch above the oil pan. It is the ground for all 8 ignition coils. I've worked on 3 trucks that had the ground corroded inside that wire.