There is a four switch light plate, 2 switches haven't worked since we've lived here (almost a year). Well, the two switches that don't work control the front porch lights. The gutters we badly clogged which I think had created some major issues, leakage especially. As you can see from the first picture, the wires are exposed to the leakage, which has created problems.
When I removed the light plate, it smelled very musty - the light switches were badly rusted, especially the two that don't work. My first job is to clean rusty wires and replace the switches. My dad told me they are 'chained' to the first one. The next job is to unscrew the front porch fixture, take a look at its condition, and assuming it's good to go (or once it is) fill the gaps with spray foam.
Am I on the right track? How do these switches look? Should I undo the daisy chaining?