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FD 75 reel speed will not display on the Cebis. I can adjust the reel speed manually with the - / +.
The combine will read the reel speed on a FD 70
I tried another 570 on the FD 75 and it won't display either
Tried 2 different speed sensors. Still nothing
Took apart the wiring harness, everything seems to be okay.
I have checked the wires from the single point to the reel sensor with a ohm metered and everything seems to okay.
The pin position on the single point hook up seems to be the same in both headers. And checks out the same with the ohm meter.

I'm pretty much at a complete loss to why I can't figure this out. Any help will be awesome
 

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Wrong speed sensor?? You should have a 3 pin. Signal wire should have 0.4 volts when no metal in front, 4.6v ?? I think when metal is near. should be set to 2-3 mm
 

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You should be able to swap the sensor with a good one off the combine from something like the feederhouse speed sensor. Take chain off reel and spin. With voltmeter, check ohms at proper pins.
 
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