led power source

What are you ultimately trying to do with them?  Have them on all the time and just control them with the switch?  Or do you want to do something more advanced like have them on with the doors are open?  Have them on when the ignition is on?  Have them come on above a certain motor RPM?  Have them come on when the volume of the radio surpasses a preset threshold, have them come on when you are rolling the windows down, have them come one when the head lights are on, have them come on with the parking lights are on, have them come on when the brake lights are on, have them come on when the fog lights are on, have them come on when the bright lights are on, have them come on when the dome light is on, have them come on when the little light in the passengers visor vanity light comes on, have them come on when your fuel is low, or when you have plenty of fuel, how about when you hit the lock button, followed by the unlock button, then back to the lock button?

Sorry for all the questions, I guess I need to look in to getting one of those crystal balls I keep hearing about....

But, seriously, the reason I ask is because if you hook them up to constant power and rely on yourself remembering to turn the switch off each time you leave the car after your first dead battery you'll be back here asking us how to rewire the LEDs so that they do one of the things mentioned above (or maybe something I missed as that is by no means a complete list of what we can do).

If you want an ignition source of power then you can't hook in to your audio amp, unless you use a relay.

Do you know how much current each LED stick uses?  I would guess that you could wire them right off your cigarette lighter with no issues.  You could then use the switch to turn them on and off without fear of forgetting to turn them off.

So i would need to wire each one to the switch instead of having them in a series? So instead of

Power -> switch -> LED 1 -> LED 2 -> LED 3 -> Ground

i would need

Power switch -> LED 1 -> ground

                     -> LED 2 -> ground

                      -> LED 3 -> ground

would the second one mean that they dont dim from having too many lights???