Check the side panel, left side, just under the seat.
go to: www.goldwingdocs.com
The high beam may be blown. ---- Bad relay.
Good idea to check the battery. Might need to be charged, or changed.
Goldwing hands down...
The fuse box on a 1981 GL1100 Goldwing is located under the seat near the battery. It is sealed in a water tight box to prevent damage.
Try this...... http://www.crc2onlinecatalog.com/master_cyl_rebuild_guide.htm
Yes, it is. However, there is separate gear oil in the final drive of the Goldwing, as it is shaft driven.
586.4 pounds (dry) (Ref: http://www.motorbikes.be/en/Honda/1981/GL%201100%20Innerstate%20Gold%20Wing/) Hot2MtnBike
Follow the lower rad. hose. Its in there. Have to remove the rad.
Candy Burgandy or Metallic Blue Black http://www.txwingz.com/gwdisc.html
Any lower on those models, and the pipes will hit the road around the corners.
The oil drain plug is on the front of the motor below the oil filter.