Quote:

I would drop the switch out of the dash and check the bigger wire , i think it is brown. I would use a test on it while you are cranking. It may be a bad terminal connection.



We had this problem with a 78 power wagon, the ignition switch would drop out enough juice so the ignition box would not fire during cranking.

Let go of the key and it would just catch as the switch contacts went to the run position.

Replacing the switch cured the problem.