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I have a digital volt meter which also reads ohms but I have no idea how to test the speed sensor. How to, where to connect and stuff. I need some guidance on this one. 99 F150 4x4 Thanks.
the pickup in the hub is the ABS. Some call it a "speed" because it measures the revolutions and compares to the other front wheel, and rear axle to compare and see if one is locking up, or slipping.
i dont really know the resistance. wonder why the back one reads 4 x as much? could be bad, or maybe becasue the gear is 4 x larger? is this why you took it apart?
You may need to use your low AC scale because they are magnetic field change sensing and produce a voltage output the module uses when the wheel is rotating.
Resistance is for general static measure to check for shorts and opens in the sensor and it's connecting cable.