The heater core is out. Besides the heater core leaking coolant, there was tons of smoke last winter pouring out my dash one day when the fan died. Lots of burning smells. Now I have a new fan motor too but I do not see anything burnt in the heater box. Is it possible it was that resister in there? It looks fine.  Is there a way to test this fan before putting it all back in today?
 
Thanks,
Bryan