Mirror signals
The mirrors I have installed have had the indicators in the glass. I have not just added indicators to the standard glass. We replaced, on a Dodge, new mirrors that had the indicators, but the truck was not wired for them. We had to run wires from the mirrors, through doors in the routing of factory wires and get them through the firewall under the fuse box. The instructions showed us how to do it, but it took a while.