Thanks Crewcab59!
Primer job is done on frame but my I broke my airbrush fitting while preparing things for painting red!
Don' have time to get a new one, so I tried do "repair" it... Hope it will work...
Dabears, here's the way
I think I configured my roof light (pdf joined). I can't be sure because I didn't note the polarity on wires and I'm not good enough with electronic to assure there's no other logical way... But it's the real wiring, with 8 leds on a connector and 5 on the other. Worked well for me till now, but not sure it doesn't have bad effects on circuitry or leds... Take care. A better way should be using a separate circuit with a servo switch like this one:
http://www.robotmarketplace.com/products/0-PICOSW1.html.
Hope it help!
Gaetan