Internal lights problem

[jefferson.t6]

Hello all,

VOLVO S80 T6 2001 LHD
My internal lights got some strange issue. When the baterry is plugged off and then on again, the lights come ON and stays like that for about 10min.
Then it turns off for good. Yeah, never comes ON again. Only when the bat is taken off and on again, the magical moment of having interior lights is possible.

Bulbs ok, fuses ok.

I start thinking about realay unit, but i really dont know each of the various relays on the trunk is the one causing trouble.

So i would ask u guys, does anyone knows a clue for this or having similar problem? Ideas?
Does somebody know/have the relay diagram for this car?

Thanks already for any help.

[Niva]

Mine did the same

I found when I left the key in postion II and attached the battery it fixed the problem