power mirror problem

I have a 2001 Civic LX coupe. Im having a problem with my drivers side mirror. I disconnected it and connected some m3 mirrors to see if the m3 mirrors even work. They did work, but when I to plug back my regular mirrors back in they didnt work.

So, I swapped the drivers side and the passengers side and the drivers side mirror worked in the passenger side harness. So, its not the mirror. I looked at the fuse guides for my car both inside and out and I couldnt find anything for the mirrors.

Then, I took a multimeter and I tested the drives side voltage and it was outputting only 3-5 volts. I know theres something wrong, but I cant figure out what? Is it a fuse? relay? can the switch be causing it?

the only thing i can think of is us the mulitmeter to trace the wire(s) from the mirror plug all the way through as far as you can to see witch part in the harness is messing up or has to much resistance idk it sounds really wierd