Replaced alternator & battery won't start

yes, could be ! change your fuel & air filters , its winter time , yes !

The new alternator is probably ok.
I would say you burned a fuseable link in the wiring harness.
The alternator has a fuse wire between it and the battery to protect it from overload.
Have someone check the wires coming out of the back of the alternator. The big wire should have battery voltage, the small wires energize the alternator when you start the engine.

check your alternator check battery see if battery is charging.

That suggests that the problem is in the harness, something in the connector or wiring is causing an open circuit. You will need to have the circuit tested to find the fault. Ford alternators have known connector issues & new aftermarket connectors are readily available at most auto parts stores.

on the backside of the alternator there should be a large black/grey wire. check to see if there is battery voltage on that wire. If there is not than you have a blown fusible link that is inbetween that wire and the battery. If there is power there than check for power on the dark green with dark blue wire. There should be power anytime the engine is running. If there is no power than there is a problem with that wire in between the alternator and the ASD relay.

Check those two out and let me know what you find.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

it probley shorted out the brain box

Get the battery & the alternator checked (Autozone, O'reilly's or even Pep Boys can do that for free). If the alternator is out or going out, it's not charging your battery - that means everything electrical in your car is now trying to run directly off the battery & draining it (it doesn't take long - especially if the lights or A/C is on). If those check out ok, take it into a mechanic & have them run a diagnostic - you may have a relay out. Good Luck.

something is seized up idler pully, alternater, ect...

did they run a test on the alternator!! at battery when off should be at least 12.6 volts, less than 12 volts battery is bad. when running at battery voltage should be at least 14.1 to 14.7, thats if alternator is ok. if less than above replace alternator. if alt. is ok, could be a bad battery.

CHECK ALTERNATOR 175 AMP MEGA FUSE. AND CHECK ALTERNATOR 20 AMP INLINE FUSE.IF FUSES OKAY.REPLACE BATTERY CABLES AND CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR DAMAGE.AND CHECK DRIVE TENSION.MAKE SURE DRIVE BELT NOT DAMAGE OR SLIPPING.