Heater Fan/Blower does not work.

its bad again or is loose or had debris in the blades of the fan
the fan can be bench tested at any time 12vdc battery tested.
some cars leaves or bugs/nets etc can get in to top front cowl vents
and fall to the fan box(etc), only looking proves the podding.

There is a relay that powers the blower motor circuit . Left I/P fuse box , do you know where that is ? The relay is IGN 3 relay .
Fuse Block- I/P - Left
LF of the passenger compartment, behind the kick panel
IGN 3 RELAY
--
IGN3, HVAC CNTRL MODULE
IGN 3
10A
HVAC CNTRL MODULE, TC SW., HTD SEAT SW.
Does your car have Manual or automatic climate control ?

Checking the blower resistor is difficult at best. Replace the blower resistor.

blower fuse is 30amp. underhood fuse box and heater control is 10amp.under dash fuse box.disconnect the blower and connect test light to two wire to blower connector and recheck. check separate purple wire for power and orange for ground by turning different speed on the switch.If no ground replace the resistor (4 wire connector) next to the motor on heater box.

in review
the fan speed resistor is new
you bench tested the blower motor
12 volts test ..only runs it at full speed
if cabin filer want changed the blower motor would run hotter

could be the motor brushes or bush/motor bearing when slowed
you might want to inspect the brushes and clean the dust out of the motor
if no better
does that have climate control ?
might be the fan switch itself or the earth isnt so good

Sounds like you have an alternator belt that is slipping. Check belt for glazing and cracks. If either is evident, replace the belt

With the fuse in,and the engine off,start pulling ,relays,one,at a time,the relay that you pull that drops the voltage will be the one that is stuck,this fuse controls the ignition relay.This relay is stuck,and needs to be replaced,by the way,try unplugging the alternator to see if the voltage drops also,cause the 13.5 voltage that was tested on this alternator concerns me,this is not good,really should be 14.25 when bench tested,on the vehicle,with everything on,headlights and ac on high blower motor setting,it should read 13.65 volts,to 14.25 volts at the battery.Now on the bench,it should have read closer to 14.25 volts.If it is any lower than this range,the alternator is not working correctly.If this was at all helpful,please rate,and thank you.

Unless they moved it and are still using the same part,I would say that this one is located behind the glove box sandwitched between the underside of the dash and the top of the airbox.The blower motor is mounted to the underside of the airbox.

First thing to check would be the fan speed resister, fan(blower-motor)relays, and possibly a bad ground. Start at switch on the dash and go to the relays and resister next.

There is 3 things you can check: the fuse, the relay switch,and the resister block. If these are ok, check the wiring from the blower to the fuse block, to the control switch. good luck.