Just bought a 2014 FatBoy. Haven't had a Softail in years. The O2 sensor connections on a Touring bike are easy to find under the right cover. Getting ready to order a set of Nightrider FL-VIED-10s for this FatBoy and of course there is no side cover, looked under the seat but didn't see the usual black and gray connectors. So where the heck are they connected so I can plug the VIED in?? Only had the bike a day so no service manual yet.

 

Don't know on a 14 but on my 07 front one was behind the voltage regulator cover and rear one was down in battery box.

 

 

On my Slim, which is similar to a FB, the front cylinder connector is located at the bottom of the frame, right behind the voltage regulator.
The one for the rear cylinder is located under the seat... Just follow the wires...

 

Yep that's where they are on a 14 Heritage

 

Ok, thanks guys I'll check. gotta get used to having a Softail again, lots of stuff is different from my touring models. Not much seems to have changed on these over the past few years.