injector not working

[kidtsi]

I know for a fact that my friend injector number one is not working, i swap the injector and same thing so i know the injector is good but i kinda think is the connector, is not getting power but idk what could it be.
is there any relays for the injectors or something is wrong with the wiring harness?
im not a newbie but sometimes things are frustrating

ill try to sawp the resistor pack but what else could it be if its not that?

 

[gofer]

Don't swap resistor packs unless you've got one readily available for testing, you can use a multimeter and test the resistor pack thats on there.

If the resistor pack tests good then it could be the injector driver inside the ECU, it can be tested using a noid light.