What does this part control?
 

It is located in the fuse box.It is a silver cube part # 0015420219

That would be the relay for the spousal ejection seat! :rolleyes:

Should be about 6 of those common relays,

seats, windows, aux fan, air pump, ect...ect

This is what is not working: Aux fan,a/c-heat fan and the a/c works speraticly.When i puled it out it was very hot.

Just swapped out another relay [same #] and the a/c heat blower still does not work.

Climate-control blower, I believe it is a fuse on the L inner fender in a black box, about 1.5" x 3/4", a wire coming out of each end. Metal strip fuse, either 30a or 40a (can't remember). Search "strip fuse" or "blower fuse" on this or the diesel forum for a photo.