The light, if it illuminates, if fine . . . . . if you get flickering on the oil (pressure) light using two different sending units, and you have checked the wiring, I would bet you have low oil pressure.
this can be caused, of course, by having too little oil in the reservoir/engine . . . . I assume you've checked?
"Here is your country. Cherish these natural wonders, cherish the natural resources, cherish the history and romance as a sacred heritage, for your children and your children's children. Do not let selfish men or greedy interests skin your country of its beauty, its riches or its romance.” T.R.