u/Double_Fisherman2201

Hi, recently my boyfriend and I bought a 2009 Peugeot Boxer that had been converted into a campervan.
Shortly after buying it, we noticed that both the lights and the wipers were malfunctioning. Sometimes they wouldn’t turn on at all, and other times they would switch on and off by themselves.
We took the van to a mechanic, but unfortunately the issue wasn’t resolved. In fact, when we got the van back, the indicators had also stopped working. The mechanic has already replaced both the BSI module and the column switch.
Does anyone have an idea what else could be causing these electrical problems?