How about he use another LED so when it lights up, it's a good indicator the circuit is working.
Heh... you need a 3-state mechanical switch of some sort.
Basically your question amounts to "how long a piece of string should I get?" It totally depends on the application. They're your lights, you should know how many there are and how much current they draw. Get a diode that can carry enough current, and reverse breakdown voltage that can handle the supply voltage backwards.
Old Systems retired due to new car
New system at design/prototype stage on BeagleBoard.
thanks rob, i got it working :-)
the diode worked perfect!
well here are some pictures of what i started....
next is under the driver/pass leds :-)
i got a little bored :-P so what...
Don't know if you still need this, but all you'd really need to do for this set up is get a switch that has 2 prongs for each setting (all the ones I have do?) and it should work no problem.