No ohmage to 1993 Audi 90s crank shaft positioning sensor

I recently replaced my crank shaft positioning sensor in my Audi. I had my car out for about 4 hours after I replaced it and when I shut it off and started it up again, there was nothing. I checked the fuse on the sensor and that is good, but there is no ohmage going to it. Any ideas as to what I should do or what the problem is?