2005 Xterra: We installed an aftermarket radio yesterday and last night went to turn on the heat and it wont work. The lights work, the other functions presumably work, but not the blower motor switch. We took the panel off when we got home, made sure all the connections were tight, turned the car on before putting the panel back and it worked. So we put everything back together, turned the car on again to make sure it was still working, and it stopped working again. So we took it apart again only this time no matter what we did the switch wouldn't work again. Any ideas?:|