Loud Beeping noise coming from dash after new ABS pump installed

I've had quite the run-around with trying to get my ABS system back in normal working condition. Diagnosed by Toyota, I needed to have a new actuator pump assembly. However, the used part online costs about $250 where new it costs almost $1300. I was told by one person that I may need to order it new because of the resistor, which they thought MAY also need to be replaced with the actuator... After a ton of digging, I decided to order a used ABS actuator pump online. I had it installed yesterday and it worked for a few minutes before a very loud, high-pitched noise came over the speakers and the brakes lost pressure again. This is what I was told MIGHT happen if I did not have the resistor replaced along with the actuator... Does this sound like what the problem is? The same lights are still on. The ABS and the red emergency brake light.

So now my problem is even worse and I can't even drive the car because of this deafening noise happening constantly... I found the resistor online for $25 but I am finding some information suggesting that the actuator and resistor MUST be bought new together? Can I just replace the resistor with a used one and have it be alright? Is there any way to get the stupid beeping to stop? Help!