I'm troubleshooting the fuel sender for my son's 2003 GT Mustang 4.6 V-8, and could certainly use your help. Little History: I just replaced the fuel pump module. I troubleshooted the problem up to the fuel pump. He was just driving one day and the engine died out and never started up again. Before I replaced the fuel pump module, when ever his fuel gauge would read 1/4 tank, it was actually reading an empty tank, or near empty tank. This I believe is what contributed to his fuel pump failure and burning it out. At that time, he did not realize that his fuel gauge was reading incorrectly. Now, after I replaced the fuel pump module assembly, his fuel gauge reads 3/4 tank, when he tops off his fuel tank. This is what makes me think his fuel gauge is defective. I used extreme caution while installing his fuel pump module, not to bend the float arm in any way. I'm planning on looking for an after market fuel gauge, however, before I do, I want to test the ohms on the new sending unit at an empty and full tank. I most certainly don't plan on removing the fuel tank again. What a job that was. I was told by someone on one of the Mustang forums that the ohms reading for my sons car is 15 ohms full, and 160 ohms empty, can anyone confirm those spec's, good to be sure! The diagram provided here is of the fuel pump wire connector, that I got from my AllData online subscription. So, testing the sending unit, I would disconnect the fuel pump module wire connector, then I would contact pins 5 black/orange ground, and 8 yellow/white wire that runs from the sending unit to the fuel gauge, with the lowest ohms setting on my tester, is that correct? For draining out the fuel tank, if I located the Schrader valve on the fuel rail, and hooked up a fitting to the Schrader valve fitting, with a drain hose, could I simply turn the key to the on position to keep the pump working to drain out all of the fuel in the tank, is that possible? So, if the 15 and 160 ohms figures are correct, what type of gas gauge would read accurately for me? Meaning, with what parameters? Any thoughts, suggestions will be greatly appreciated. Thank you, Tommy.