Does the ECM B fuse power the items that you replaced?

What happens to the truck when the fuse is blown?

 

ECM B fuse is for the fuel pump and fuel relay from what we have read. Truck don't start and blows the fuse when we try. We read that if this fuse blows the fuel pump is most likely the culprit but we replaced that.

 

Have you tried just leaving the oil switch disconnected?

 

We unplugged the oil pressure switch and it still blew the fuse. Someone said it could be the vehicle control module. I don't think there is a way to test that. I am no mechanic so I am not sure.