Crazy tach, odometer quit working, engine rough at start

[jda1arm]

'92 chevy silverado. Odometer quit, tach is jumping all over the board and the engine started running very rough when you start it up. Runs fine after warm up. A little shaky but I have TBI adjustments that need done, just never got to it. Also, drivers side rear turn signal socket keeps getting a surge and blowing out. Someone told me their could be a short in instrument cluster causing all of these problems. Anybody have same trouble? Any ideas? Thanks.