This was a huge pain in the a**. I purchased a wire harness adapter off of eBay, which will never do again. It took my today alone 2 hours to get the radio in working condition. I had to rearrange the harness connectors so that they matched up. Now i am having the issue of the radio is not saving any of the settings; so every time i turn the radio off it erases the settings.
and BTW if anyone wants the wiring setup for the 2005 Sentra SE-R i can get the info and post it for future referrance to save someone else the headache.
