Strange turn signal/indicator behavior

After the loss of power to the LH Rear indicator which was traced to a broken wire in the tail light cowling the now function of the indicators on activation is a rapid flash. This is for both left and right. If the indicator switch is set to of and then switched back to the said indicator it then blinks normally.
Fitted is the original blue (can we call it relay?) can on the spring.
I see AN sell a capacitor as replacement for this item, but my problem is I am planning to do a three day tour as of Friday.
Any indication to how to solve this problem would be gratefully accepted.

Woody850 said:

Fitted is the original blue (can we call it relay?) can on the spring.

Click to expand...

What is generally referred to as the blue can is the 2MC emergency starting capacitor not the flasher relay.

I see now and in the book 'Flasher Unit Lucas Type 8FL' could eventually be the culprit, but where is it located?

Usually on the back plate of the frame or the plate attached to it depending on the model (not 850 Mk3).

Thank you, it is a 1973 850 Roadster. I will have a look as soon as a supplier has called back.

Switch the indicators on and follow the clicks. It should have a double white and a light green/brown wire attached.

Rapid flashing is caused by excessive Current draw, so a partial short circuit could cause that,. Because it displays intermittent symptom I would look to the handlebar switch, or, the flasher itself as you have suspected.

Also, be sure you didn't accidentally create an intermittent Short while affecting the repair in the tail light CowL.