earth issue i think

[pjb0150]

when i operate right turn indicator
it flases but the radio and other lights go dim and light up in time with it ,,,

when i swtich on main head lights it automatically switches on right hand indicator so that is on all the time
if it is earth problems ===where are the earths

[pjb0150]

oh and theres no issues at all with left hand indicator -works fine

[lozz]

check the bulb clusters in the rear of the car.
it may be water ingress causing it to feed back,
also check the bulbs,

also please can you add what make and model of peugeot 406 you have,
deisel -petrol d9- d8 what year,
this info can help people to Answer your questions with more detail,

but ithink the problem on your car is either a incorrectly fitted bulb /bad cluster or the seal as expired around the rear light causing water ingress,
Radio will light up with these symptoms as the display is looped to the head lights.

this is my guess but icouid be wrong tho so dont rely on this info being the remedy to rectify the problem this is just a guide what to look out for