It is likely to be the indicator module, a lot of feeds seem to go through this, check out this thread page 2 onwards
http://www.talkmorgan.com/ubbthreads.php/topics/517471/re-near-side-indicator-issue#Post517471Excerpt below
"I had a problem with the full beam which could not be switched on. The dealer thought it was a wiring problem but could not find the fault. They tried a new indicator assembly but the fault was still there
On my way to the MTWC opening run the hazard warning lights came on, all the lights on the dashbord lit up and when I tried to switch off the engine it kept running with the key out of the ignition!
The M3W was driven to the hotel where the only way to stop the engine was to stall it and after that it would not start
Skullmog spent over 2 hours on the Saturday evening trying to find the problem and after ruling out fuses, relays, immobiliser and ECU he thought it was the cambus. Thanks again Kevin for your help
The vehicle was trailered back to the dealer and 4.5 weeks later was fixed, the problem being the indicator module unit. On the invoice it was shown as M3W TURN SIGNAL HEADLAMP MODULE and was £39.89 plus VAT
The old part was given to Skullmog for him to look at
At the time we, the MTWC, did not know of anyone else having a problem with this unit"
There have been a number of other instance since.
