Where to tap speed sensor signal?

[Lord Popgun]

First I’d try the blue. The white goes to the -
If you don’t get anything, I can put an o-scope on it and see what the pulses look like (yes Max, I bought one just for this stuff).

THIS—I would also suggest that the meter be connected to both wires. Not ground and one wire.

On outboards, when looking at the triggers you have to use a DVA adapter (direct volt amps) that plug into a Fluke DVOM. It actually just a little integrater circuit, a cap, a diode and a resister). The cap has a SLOW discharge time through the resistor so the pulse voltage will charge up the cap as the pulses come in directly to it, and give a voltage reading. Might need something like that on this. So, TLDR, cap has a fast charge time, slow discharge time. Thus, a voltage builds up that the meter displays. RC time and all