While I wouldn't have sprayed lubricant onto the board, I doubt it shorted anything out. Most of those spray lubricants are relatively non-conductive, and certainly wouldn't draw enough current (10A or so) to kill the 5V supply (or fuse) that drives the LED. And if it did, you would have DEFINITELY noticed.
But since you say the pins were stuck and you got an LED, but after unsticking you lost the LED, I'd say you've got a connector problem. Test your voltages at the board, and wiggle the connector a little... you'll probably need to replace the connectors on the board and harness.
DogP