Strange Indicator Problem On 2015 Scrambler

Today I noticed my indicators are not working. When I activate the alarm all the indicators flash as expected so I know all the bulbs and wiring is ok. I do have aftermarket bulb indicators. So I was checking through the wiring and bulbs when I noticed that when the left rear bulb holder is unscrewed from the indicator body the indicators work fine! But as soon as the bulb holder is screwed back onto the indicator body the indicators stop working. I have no idea how to resolve this and am hoping somebody here can help?
Thanks
Dave.

 

Youngy, that did it, thankyou. Its a mystery to me why I suddenly need to swap the wires as I am pretty sure I haven’t touched them, I did have the indicator fuse blow last week! But pretty sure I didn’t touch the wires although I am getting more forgetful in my old age
Anyway sorted now