[Power Hungry]

On a Super Duty, you can also use the inductive coil pickup on one of the injector lines. The passenger side harness was usually the easiest to access. Look for any of the BROWN wires with a colored stripe. (See attached image) These are the injector power leads. The black ones on the end are the grounds. The big lead in the middle is the glow plug power. You may need to strip back a little of the loom and tape to get enough access to the leads, but this usually works quite well.

The OBS trucks are not too different, but they usually have a lower voltage output and often will not generate enough EMF for the inductive pickup to register a valid signal. You can try it, though.

Good luck!