leds wired to turn o when i oppen the doors?

[PA Runner]

I just got after market sterio system and i would like to know to put one or two small leds in the grill of the speaker to light them up. i also want them to turn on when i open the door if at all posible. i think tying into the dome light circut would work but i just cant figure it out.

 

[PA Runner]

I just got after market sterio system and i would like to know to put one or two small leds in the grill of the speaker to light them up. i also want them to turn on when i open the door if at all posible. i think tying into the dome light circut would work but i just cant figure it out. oh anf i have a 3rd gen.