Where to tap speed sensor signal?

[SportsterDoc]

My response to egleaves was limited to identifying the wire for a speed signal, as instructed by Signal Dynamics.

I know my limitations (most of the time), thus the suggestion to contact Signal Dynamics and to return the responsibility to them.

As for a signal off a cam position sensor or crank position sensor, my little bit of knowledge is limited to H-D Sportsters (and some Jeep Wrangler) experience:

Sportster crank position sensors are 2 wire units, which may be described as variable reluctance sensors or magnetic pulse generators, etc. They do not have as clean a signal as hall effect, but generally more durable (simple coil). As with the hall effect, they are typically rated -40 C to 150 C (300F).

For 2004-2006 Sportsters, the voltmeter red lead is connected to ICM position 8 and the black lead to ICM position 9.

For 2007-2013 Sportsters, the voltmeter read lead is connected to ECM position 30 and the black lead to ECM position 12.

Note: This is a sine wave and requires the AC scale
While cranking: ~ 0.3 VAC
At idle: ~ 1 VAC
Static: N/A

When your bike is not starting, this basic test will validate a functional CKP or indicate a failed CKP. A failed unit will not provide a signal. However, this is not sufficient to test for a failing unit with inconsistent output.