I read where someone said these switches were difficult to wire due to the small size of the terminal and I read where others said they messed up the switch by soldering the wires to the terminals brought, but I there were no problems. First be patient. It helps to pre-solder the connectors and wires first, then just hold the wire on one side of the connector and the soldering iron on the other side and heat the connector and wire for about 5 seconds and then you're all set. It works much better that way. I love the size and how discreet these switches are. They are great for the extra interior lighting I added to help my kids find their devices who seem to have a bad habit of falling into the truck everywhere.