Where can you locate the fuse box for the speedometer to a 91 Nissan 240sx?

Answer

there are only 2 spots I know to find fuses, one on the driver side next to your left foot, and in the engine bay near the battery, I would imagine the fuse for the cluster is located somewhere on the inside box. If it's a digital cluster though, the problem might be the cluster and not the fuse.

there is another fuse box under the the air intake,all the way to the left. when u get a aftermarket intake you have to bolt it down cause it moves around.