Quote Originally Posted by BJH324JH View Post
Also how do you know if you grounded it properly?
The only way I ever knew I had grounded properly was that the item worked. If it did not and I thought it was the ground I would check to be sure there was bare metal to metal contact. I did not have to do that with my fuel pump and I just used one of the bolts the mounting plate is bolted to the frame with for ground. Whatever bolt you are bolting the pump to the truck with will do fine for a ground spot as long as you are bolting to the frame.
On the Duralast oil pressure switch I don't see why it would not work, the thing is just a switch that cuts off when oil pressure fails.