Tom:
Thanks much for the info on the amperage and the RS led. Though the link to Radio shack bombed out on me. Not sure if it was on my end or RS end, but the link would not pass. At any rate, thanks to your information, I now know the resistance value, but still do not know how to wire the circuit and where to make the tap.
I have had to be persistent, but I am getting ever closer to the goal.
The only remaining information I need is how to actually wire the LED.
Ron:
I appreciate your attempt to tell me how you did this, but your answer still leaves me without a solution. Can you tell me more about what this mysterious Motosat adapter device looks like, and exactly where you wired it into the circuit? As you can see I am very persistent, and am not going to surrender until I know exactly how this feat is accomplished. Generalities will not enlighten my stupid brain.
Maybe I really do need to climb on your roof? Or maybe I really do need a picture? Is this tap a device that has a female coax connection on each end?
With a pair of terminals for the led? I don't see any other configuration it could have if it taps directly into the coax. And why didn't you explain this in the first place, rather than make the vague reference: "The same principle is used to light the dish up as Motosat in that the LED is powered from the same 18 volts as the LMB is powered from." That was a true statement, of course, but it did not give me all the information I need.
We have come a long way from that original comment to what you have just disclosed. But we have yet to cross the finish line.
Does you unnamed friend have more of these adapters? If so, does he sell them or is there some other way I can "bribe" him to release one? I bet if he went to QZ he could sell a ton of these.