Just to add my 2 cents because BMDouble is correct. This Fan Control is a variable voltage signal so if you have voltage at pin 48, do you have the same voltage on pin 4 at the cooling module?
If the fan doesn't work at all and you have voltage there then the wire is not broken. You can check this another way by disconnecting it from the PCM and module and check the resistance. You should have less then a half ohm on that wire. However, when you say you have voltage and ground everywhere, do you have voltage at both fans and they don't come on?
Thursday, October 22nd, 2020 AT 1:55 PM