I too replaced The oem Bose radio with an after market. The dash lights do not work If I leave them un-connected. I get 12 volts on both of them when the light switch is on. I get dash lights wok if I hook one of them to 12 volts but they do not dim and do not turn off. If I hook the other to 12 volts it makes the lights on warning bell.
JA: Have you checked the fuses? The dashboard bulbs?
Customer: Yes, I pulled and ohmed every fuse that I could find.. The lights work when one of the wires is hooked to 12 volts. If I hook the one that gives the warning bell to ground and turn on the lights it blows the tail light
fuse. If I hook the other to ground and turn on the lights it blows the audio fuse, I think. I am getting tired of trying to figure this out.
JA: What is the model of your '12 Nissan?
Customer: Sorry, it is 2000 Maxima.
JA: Are you fixing your Maxima yourself? What have you tried so far?
Customer: Yes Pearl, I don't farm out too much work. If I can do it I will.
JA: Anything else you want the mechanic to know before I connect you?
Customer: I thought that I was connected