On an '08 Dyna.... trying to get my auto tune going. I am supposed to plug it into the diagnostic port...they say the left side by fuses but nothing is there.

 

it's a grey connector. has a rubber cap on the end of it.
it's right under the maxi fuse....

 

Its not there. I can see where it would be held to the box... I wonder if way back when when I installed the power commander if I accidentally burried it somewhere?

 

you might have. take a pic of the bike and let me see.

 

From another thread

 

Wasn't able to update this before I left for Sturgis...am back now.

Last year when I put in the PCV I must have disconnected the diagnostic plug. I could not see it in the space under the seat so I pulled out the ECM side of things and I found the plug burried behind.

Note to self...put back things as you found them