Remote oil ports. Which is send and which is return??

OK, so I removed both lines from the remote oil filter housing and had someone crank the engine several times for about 3 seconds each time. Not a drop of oil from either line. So I put about 2 more quarts of oil in the motor and tried it again. No oil coming out. At this point I think either:
1. The oil pump is shot and needs to be replaced.
2. The pickup has somehow come loose from the oil pump.
I cannot think of any other possibilities. I would have to remove the front cover in either case.
I've never done this before with the motor in the car. I'm wondering if I will need to loosen and drop the pan a little to get access to the pickup. I hope not!