It appears the value of the fuse depends on the model. On some models the fuse is not used (deadheaded) and a 2amp fuse is inserted. On some models (see attachment) the circuit is used and a 15 amp fuse is inserted. I guess the same fuse cover/label is used on both models. If you have a cigarette lighter, I would say seeing a 15 amp is correct. That circuit also drives optional heated hand grips.