Hey I'm hooking up some under the dash lights and want to splice into the illumination wire on the back of the head unit with a relay to turn my under dash lights on and off when I turn the headlights on/off. I found out that the orange wire is the illumination wire but when I pulled my radio out there are 3 different orange wires going to three different plugs in the back. One orange wire is slightly heavier gauge (18?) and the other two are skinnier (20-22?). I have a volt meter and I turned the car on to with the headlights on to see which orange wire was being powered but I couldn't get a reading off of any of the three. Can someone tell me or point me in the direction of how I can know which wire it is?

 

Alright I'm posting the answer to my own question just incase anyone else wants to know...I read the sticky at the top of the ICE section and found out that the green wire is illumination and orange is for the power antenna. I was using a dmm to find which one was switched by the headlight stalk but none of the orange wires was registering. When I checked the green I found the one that is powered by the headlights. Under dash lights look great by the way!

 

Good idea, man! you should post a quick DIY or somthing...i really wanna put underdash lights in but i kinda wanted to have it come on when you open the doors like the dome and sills... i was going to add a "add-a-fuse" but then i noticed that they don't make a LOW-PRO version of that... kinda sucks cause I have no Idea how to use a multimeter...lmao