Oil Pressure Warning Flicker

Recently the oil pressure warning light has started to flicker. After having the bike checked at the local Triumph dealership it was addressed to the fact that it was a wiring problem. The dealer suggested to change out the speedometer at a cost of 1200 Euro or have a car electrician look at it. After browsing around I found out that it is not an uncommon problem and I wanted to see if anybody in this forum have had similar problems and how they fixed it. I did check that my bike is not eligible for a recall (which doesn't solve the problem anyways)