Originally Posted by IcePack
Dave, Yes. But thanks for the hint. The loom diagram I have is useless. But I guess the red/yellow wire must go back to the instrument cluster (CanBus ?)

https://www.gomog.com/allmorgan/44WiringDiagrams1998on.html

Morgan wiring diagrams became difficult for owners after a supplier change. If you need help, ask.

gmg