I have a 88 r100rt and had an issue with charging.The "gen" light was not on at any time.I took the cluster apart and checked the plastic board for damage and it looked ok.I removed the bulbs and lightly cleaned the contacts.Low and behold I now have the "gen" light nice and bright with key on.The female pins on the contact did have corrosion.I used some contact cleaner and q tips to clean but is there any
other tools for cleaning the plastic contact strip with out damaging it.I have been told its close to impossible to find a replacment board.