Motor blower problems

Are you sure the new resister is good? Also, when you say you get no voltage on high setting, at what point in the system are you checking? Are you sure none of the wiring harness pins are pushed in or damaged?

Test the blower switch at high position it goes thru the blower motor relay to apply full battery voltage to the motor-with less resistances-

Let me try and give you a brake down on the wiring harness
will start at the blower motor has two wires black wire should have ground at all times
PPL wire power from the relay at diff speeds

back at the relay box (under the hood left side )
HVAC blower motor relay 4 wires and power from fuse #53 its 30A
Place the switch on high and check the ORG wire at the rear of the relay for power if no power go back to the switch and check the same color wire for power if have power repair wiring harness between switch and relay
if no power at the switch check BRN wire at the switch for power
should have power assuming other speed working and suspect bad switch
if all testing OK
lets go back to the relay
BLK wire should have good ground at all time if check for opening in the wire and ground
last wire PPL wire we are going to assume its good, because blower motor is working at diff speeds
good luck