no start condition - hall sender voltage never changes

[boomer]

Hey guys, I had a no start condition on my car a month ago and it cleared up after a few hours. No start returns, no spark at all. 
Ignition on, ohm meter probe in the middle wire of the hall sender, plugged in, turn over the car with a socket wrench and stop at the window with no change in voltage (8.5 volts). 
Turn over again with the socket wrench not pausing at the window like a normal engine revolution and the voltage never went to zero or fluctuated. 
The window is supposed to lose voltage at that moment which triggers the spark from the coil correct? 
So... I need rod to get me a hall sender. 
Is this correct? it is an 83 urq  manufacture date 3/82

Thanks for the help previously and futurely! boomer