I have a 2004 ford freestar the blower motor isn't working at all I've replaced the blower motor and the resister is new all fuses are good the a.c. comes on but the blower don't come on at all idk what else to check I'm about to start checking wires next but I need some help winter is coming up in a few months and I need to find out what's going on

 

Welcome to the site..

Weather it's a manual resister type or electronic Module control blower,, both systems use a blower relay. The resistor/control module basically control the blowers ground (resistance) for motor speed through the selector. Voltage for the motor comes trough a 'closed' blower relay and of course good fuses.
Ground control to close the relays contacts is done by the Smart Junction Box..

The key to finding out which way to go or diagnose would be a series of checks (voltage-continuity) for fused input (Hot still times), output (to the blower motor), and switched (hot in run) input,, only leaving the grounding control for the blower relay achieved by the SJB in question.. If the fuses check,, Could be the relay is bad, or any of the input/output etc are missing. Checking the removed blower relay connector face for needed applications should prove which way to go..

If you have a test light/meter (?) I can help you with some check points..

Fuses are F1.14-30amp and F2.14-5amp for the blower relay load and switching,, and F2.12-5amp and F2.8-10amp for Module switching/speed control selection..

 

Well last night I looked under the dash and seen what color the wire was for positive and I followed it all the way to a wiring harness under the driver dash board and found that the wire corroded and eventually burned up would that cause the blower not to work too planning on rewiring today see if that will work

 

Wire to the blower motor?
What color is the wire including the tracer color?