Connection issue

[Diablo]

i have been screwing with the dash on my 91 daytona shelby for the entire week i have owned my car and i still can't get everything on it to work at the same time. when i got the car only one turn signal worked and the odometer/trip meter and tach didn't work at all. i tore it all appart cleaned it inside and out and then resoldered everything. now the tach works, the odo/tripmeter works some times and the turn signal works when you push on the dash just right. i think the turn signal is due to a loose plug connecting it to the dash and maybe the same with the rest of it. i was wondering if anyone else had issues like that and if so what did you do about it? is there a conducting paste that would help?