ok i have a 2002 ford f250 have installed the avic z1 trying to get it so when lights turn on it dims i have found the orange/white wire now how do you tell what wire it goes to on the harness dont what to cut the wrong wire or do you need to run a wire all the way over to your head light switch thanks for help

should be lt blue/red in the radio harness

that was it it works perfect thanks for help take care

help spoke to soon lights dimmed on way to work now dont checked connection says not hooked up what did i do wrong worked last night and this morning now they dont thanks for help thanks

check your connection