Heater does not work at all

What is your question?

Turned on heat Smelled burning plastic Then stopped working altogether, no power to the heater at all, switched out new motor and a new resistor, checked wiring harnesses all looked ok, still nothing, also Checked fuses Any thoughts? Help!

What makes this problem better or worse?

Nothing no power at all suspect electrical

How long has your 2006 Nissan Xterra had this problem?

4 days