Have a 1998 vulcan and purchesed a 1986 dash. The three wiring connections are a 4 plug and two 6 plugs. The problem is my wiring harness has two 6 plugs and a 2 plug. Question, figured out it's the speedo that is a 4 and it's suppose to go to a 2 plug. Could it be the blinker shut off? If so, what now?