A computer in a casket

This may have been a dream but I think it was a movie. I seem to remember Gene Wilder and Richard Pryor but don’t hold me to it. What I remember, these guys dug up a computer in a casket that was buried in a cemetery. I think there was a out door power outlet nearby but they didn’t have a long enough cord so they went around stealing electric appliances to make a long enough cord to power up the device. That’s about all I can remember.