NickandNeil

Thanks for the help with the wiring of the tacho.  I have commented on the forum and sent the wiring diagram, but, I still have a couple of issues.

I think you probably think the link id dead as you have been so helpfull.

The tach needle is moving, but violently up and down.

I have not connected a wire to the module as there are eight and I am not sure which is which.  Would that cause the needle to bounce?  Also, weirly the brake lihhts come od when the tacho is wired like this.  Any thoughts please.