Harley Davidson Turn Signal Module Location. The headlight fuse on a 2000 harley davidson is under the seat where the fuse box is located. Touring, dyna, softail, sportster, for makes:

I don't believe the fxr had a module in 1990. There are many modules on your harley davidson that track as well as monitor the state of your powertrain and accessories. To start with it, you have to keep the ignition on, and simultaneously hold down both the turn signal buttons (at the left and right handlebars).