I have ZERO experience of a Series One
In General and dependant on age, there can be a clip on the steering column with a protrusion that activates a cancelling mechanism built into the indicator switch,thus the location of the mounting of the switch relative to the protrusion on the clip for normal operation is reasonably critical... The clip is held by the grip which it has on the column but can be adjusted around the column.
I suspect later Morgans may have a different means of cancelling indicator action..? If any air bag is fitted, there is potential DANGER in messing around in this area.
To monitor the operation of the system as described in older Morgans, the steering wheel is best removed (taking note of the straight ahead position of the wheel to column interface) at which stage hopefully the mechanical action may become obvious when the steering is activated using the steering wheel retaining nut, and with the front wheels off the deck to minimise the force required to rotate the column. Or if assistance is available have someone grip the road wheel and act in a way that causes the steering column to rotate left to right... .
Hope I have not muddied the water..
