Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Hazzard and rear light issue?

As your M3W is pre 2014 it should have the 12 pin TSM and the 16 pin won't work with that loom, as Roger says. I believe you can still get replacement 12 pin modules from Morgan, certainly worth a try. Even if substituting it doesn't fix the problem then you do have a spare of this increasingly difficult to obtain item. There is an indicator relay, at least on the early cars, p/n 10R027024 or Puretek CF14JL-02 but it sounds like it works fine. Try cleaning the TSM plug connectors but probably it will need a change. I hate electrical problems!