Bike speedometer only works when I'm not sitting on bike

[DarkEnergy]

My speedometer on my bike stopped working yesterday and I can't figure out why. It logically makes no sense. If I just spin the tire, it seems to read and display the speed. When I walk with the bike, it also seems to read. When I get on the bike, it reads and then stops reading. Eventually it gives me "Err". Me sitting on the bike vs not shouldn't change a damn thing. The cable's aren't near my seat or legs, I don't even touch them. It's hard to really test if just lifting wheel makes it read because I can't really get it spinning with my hands. It aligns perfectly to the sensor and it's only 2mm apart, no dirt or debris blocking anything. Changing battery fixes nothing. What gives? Speedometer is Cannondale IQ100. 

 

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[RGProductions]

Could your weight be bending the spokes, pushing the sensor farther away?

[DarkEnergy]

1 minute ago, RGProductions said:

Could your weight be bending the spokes, pushing the sensor farther away?

Haha, no, I'm not that heavy. Besides, most of the weight is on the rear tire, this is mounted on front. 

[RGProductions]

Just now, DarkEnergy said:

Haha, no, I'm not that heavy. Besides, most of the weight is on the rear tire, this is mounted on front. 

I'm all out of ideas then.

[LucasRem]

Just manual move the magnet over of the detector, do you get any readings, it works, then check all the wires, good luck!

[DarkEnergy]

1 minute ago, LucasRem said:

Just manual move the magnet over of the detector, do you get any readings, it works, then check all the wires, good luck!

Well, If I rock the bike back and forth so the magnet passes over it, it reads. When I sit down and ride, it stops reading. I might just call them. It's only a year old!