I have a 99 f4 that won't start. The battery was new last year, and is still holding juice. But the fuel pump does not turn on when i turn the key. i replaced the pump, and the first time i turned the key it came on for a second, but that was it. i tested the ground to the pump, which was good. But i put a test light on the positive and there was no power going to it. wtf is wrong with this thing?????????????????