Check the fuses. I know, you're not dumb, but it looks good in the picture
I'm thinking the 2 wires BLack and red are for run/turn and you need to
ground the stem with the extra wire with the ring on it that came in the kit.

 

Yes sir we checked both fuses and both are good. The wire with the ring mounts on the bottom side of the mirror stem and runs to the plug (its the gray wire in the photo).

 

Here's another strange thing I noticed.

Cavity 1-6 should be: black, brown, blue, blue, violet, black.
Mine appear to be: black, purple with black stripe, blue, light blue, pink with brown stripe, black.

 

Pull the plug apart and test what colors do what with the multimeter.

 

Narrow it down. Is there power at the mirror pigtails' fuses on the supply side (hot 12V)? Then, nothing at the connectors going to the mirrors?
"The wire with the ring mounts on the bottom side of the mirror stem and runs to the plug (its the gray wire in the photo)." I'm thinking this is a ground. Try running a jumper wire from a good ground on the frame to the mirrors' wires with a ring, to be certain you're not loosing ground in the new harness (like Ranger73 said).
If a jumper/temporary test ground wire doesn't make them function, you gotta narrow it down to where the hot is lost. If you can't find a lost hot (ie. you have 12V+ all the way to the mirrors), then your handlebars/mirror stalks ain't grounded.
You gotta have flow in the hot (+12V) and ground (negitive, Earth, whatever you want to call it).
Your 6-position plug, with the different/funny color wires/stripes operates the factory front running lights/turnsignals, so that's probably not the issue. Find the exact spot you don't have hot and/or ground. Could be, both.

 

Is there power at the mirror pigtails' fuses on the supply side (hot 12V)? Then, nothing at the connectors going to the mirrors.

That is correct HarleyScuba.

I'll try the ground wire test tomorrow.

 

First I don't understand why there's only 1 fuse per pigtail or why is there's a fuse at all?
Then there's only 2 wires that plug into the pigtail that go to the light and 1 is black.

 

I think I figured it out. But I could be full of **** too.
the lights have run/turn.
the red (run) goes through the PC board, the blue (signal) switches the power in the PC board Like a relay to make red act as turn to the mirrors.
The ring wire needs it's own ground to frame.
What did you do with the 2 wires coming out of the stem, I only see 2 in the plug a black and a grey? Where's the stem ringed ground wire?

 

Ranger, only one wire is physically attached to each mirror from the factory, the black wire. The stem ringed ground wire, grey wire, slips on the bottom side of the mirror stem and held on with the locknut securing it to the mirror stem. It then is fed with the power wire through conduit to the first connector that you see with a black and grey wire. That connector is placed with the connector with the red/black wire and inline fuse.

 

Ok, then the black wire from the light goes to red side of the plug and the gray wire goes to black side of the plug.