Hmmmm, that's not a lot to go on. What loom is Jeremy using? Do I remember you saying it's a regular late 2CV? in which case it should be the same as your D*lly.
Is this the bunch of wires that run to the back of the car? On a standard car this would be a lot easier, but Jeremy's unique so who knows.
My '88 'spesh looks like this:
There are eight wires and the coloured collars all match up. Have you got a red collar joining to a brown collar, or is that just the camera? Bare in mind that if the wires are connected
wrongly here and at the back of the car, then it could still work, two wrongs might make a right in this case, although correcting it now will make fault finding easier in the future.
The wires on my car do the following, colours relate to collars;-
BLUE - RIGHT INDICATOR
WHITE - LEFT INDICATOR
BLACK - PERMANENT LIVE FOR INTERIOR LIGHT
RED - BRAKE LIGHTS
PURPLE/MAUVE - LEFT TAIL
GREEN - RIGHT TAIL
BROWN - FOG
YELLOW - FUEL GAUGE SENDER
So unless your wires are very mixed up somewhere else, I don't think these lose wires are the answer to your indicator problem. Do any of the indicators work? have you tried a spare flasher unit?
Give me some more clues and I'll see what I can think of.