[Won]

It's not a matter of how simple the questions are, it's a matter of courtesy for others who are willing to help you with their knowledge and time without expecting something in return. Shouldn't it be the responsibility of the one who's asking to do the best in his part as to minimize the work OTHERS have to do for ONESELF?

Not many people memorize the part numbers for all the major components, so it's not like they are refusing a simple task of remembering something and writing it out. Then, if it's a matter of opening a book and looking it up and not some very specific knowledge that comes only from working on these cars for many years, which it is, why can't one do it himself? Pelican uses factory part numbers in their catalogue as well.

Give a man a fish......

With the engine running, while being careful not to get caught by the fan, check the resistance between the connection on the oil pressure sender and the body/engine/a ground. It should read some reasonable number (which I can't remember but pretty sure a search will reveal), not infinite, nor 0. To check the wiring, ground either the gauge end or the sender end and check voltage between the wire end and a 12V source.