tbishur, while there are ways, it really all depends on your capabilities and the amount of room inside the head unit. I would go with a small LED that wasn't very bright. And that is because during the night, when I am assuming you need this for, even a medium output LED will look amazingly bright. You would have to figure out a way to install the LED in the pointer and run the two leads down to a current limiting resistor for the voltage you are using. And you also have to keep those two leads out of the gears and such and be flexible because the pointer needs to turn with the motor. Can it be done? Of course it can, but it really depends on you and coming up with a clever way to install it in the pointer and routing the wires carefully. JMHO