Strange alarm on TD4

Hi
Just got an alarm bleeper on the right hand indicator. Bleeps In time with the dashboard indicator light and stops when I turn on the lights. All the bulbs are ok.
The bleep is from behind the offside cover in the load space. Before I dig out the circuit tester and pull everything apart has anybody come across this?
Thanks

Sounds like a trailer connected signal from the indicator circuit. If you don't have a trailer connected (and you'd notice!) then there may be a short or low resistance on that RH indicator circuit. If turning lights on stops the signal I would start looking at earth connections to lamp clusters and stray paths via devious routes due to earths missing.

Hi. I wondered where that bl***dy trailer went!!! Thanks for the imfo, I will have a check and see what comes up. Thanks again