Caravan indicators not working - Disco

[sim_in_mel]

Hi,
I have just come to hook up the van to the disco for holidays and I don't seem to have any indicators, all other lights work.

When I initially hooked up the van the RHS indicator worked but since disconecting and reconnecting the indicators have gone completely.

Also the trailer light on the dash isn't flashing any more.

Any ideas?

[Scouse]

Start with the basics.
Have you checked the car socket with a testlight ?

[sim_in_mel]

Car socket is fine.

Trace the loome on the caravan and found the loose wire
all seems to be OK , but always happens when going on holiday