V90 Estate rear position lights

[driver219]

Since I last had trouble with my V90 CC n/s position lights (LEDs) in Feb 2023 I have re-conditioned the Main Battery (first recondition in app 7yrs) once and then trickle charged this every two months. The tell-tale warning message has since disappeared. Just recently the Main battery has been replaced, but after driving with absolutely everything ‘on’ this last week, to my surprise the n/s position light warning has re-appeared. The new battery charge capacity remains steady at 70%. Voltage +12.28V. So I am wondering whether there is a problem upstream, since both the n/s position light on the car body & tailgate are out. The n/s brake light is ok. Is this n/s position light fuse protected upstream?? No info on these in manual. But one can have a high resistance fuse which still functions, but causes a voltage drop at the load. Any ideas please?? After a nights rest all is well, but after approx a 1h drive on comes the warning message again!! Any more ideas please??