I have an '07 buick lucerne that was having issues with the factory amp, so we ended up installing a new radio with all new speaker wire to bypass the amp, and also problems where the cigarette lighter would sometimes work and sometimes not work. Before the radio was replaced, only the cigarette lighter would go out, but now that we replaced the radio, both will go out and come back on at the same time. It usually takes a couple hours of non usage to start working again, and never while driving. All fuses and relays were checked for damage but none seem to be damaged. However, the relays do seem to get hot after the car runs for a bit, not sure if that is an issue. The main problem is that I don't know why the radio and cigarette lighter go out at random times for some period of time, and why the new radio goes out with the cigarette lighter when the stock radio didn't. Thanks for any help.