Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 M3W tire question

Rodger - its documented here, on the mtwc website.
I believe the article is accessible without being a member.

My M3W was delivered with the speedo over-reading a lot, I think someone carelessly programmed the scaling number wrong.

It is also discussed here on this forum.
Obie's suggestion of scraping off the insulation (not cutting) the grey and black wire and attaching a wire to that is what worked for me, as I couldn't find the plug mentioned in the mtwc article either.

For my 2016 car I followed the instructions provided by Truckin-on in the discussion cited above in this forum. I couldn't find a separate plug with the grey and black wire but located it in the main plug as discussed by Truckin-on. I used a doorbell for the momentary switch and it worked perfectly. I have done the procedure a couple of times, first to get the speedometer dialed in with the factory tires and agains when I replaced the factory tires with Duros. Once you find the correct wire it's a piece of cake.

The grey/black wire plug only seems to be in the early car looms but, as detailed in the link to the forum discussions from JohnMat, it's there on the speedo plug and works in the same way. There is a lot of good information here...somewhere. In the early days of warranty servicing I was palmed off with "wheel speed sensor cleaned" answers to my speedometer inaccuracy questions to Morgan dealers. It really make you wonder what information they were given when the M3W was introduced, very little I guess.

thanks guys, I will give it a try