right side turn signals
 

Good morning all. Im new here and need help. 02 Cooper base, I have rebuilt/fixed most of the common problems but one comes and goes and is driving me nuts! Right side turn signals blink randomly and stay on when key is off. Sometimes they stay constantly lit, other times they blink randomly. This seems to come and go for no reason. More common when we have rain or high humidity. If anyone can help I would really appreciate it!

Have you tested or replaced your battery recently? Most of the time when super random and weird electrical things arise the first thing to check is for a faulty battery. Not that this is your issue, but I would start there. Any fault codes stored?

https://www.pelicanparts.com/techarticles/MINI/57-ELEC-Battery_Replacement_and_Battery_Tender_Installatio n/57-ELEC-Battery_Replacement_and_Battery_Tender_Installatio n.htm