Noid light: Unplug the injector(s) and attach a light.
It flashes when the injector is pulsed by the computer to open(squirt fuel).
It means the electronics from the crank/cam sensor to computer to driver to injector is working.
(but remember signal
not voltage/timing/dwell/etc....It only indicates some sort of signal is being sent).
Here's one place, but a specific search gave crap results though. I don't have time to go through them all. A universal kit will probably work.
noid lights - BuyCheapr.com