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Speed sensor signal amplitude and frequency

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fleetguard FF5319 or FF5320

Tach signal for aftermarket tachometer

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Does anybody know the specs on the speed sensor signal between the transmission and C2 on the engine computer?



Specifically, I'd like to know the amplitude of the pulse signal and the number of pulses per revolution of the driveshaft.



I'm trying to hook it up to my navigation system and to an aftermarket speedometer, and it doesn't seem to be putting out any useful information.
 
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