Wires can wear out or get damaged from rodents or corrosion, so it’s common to need to splice them from time to time. You might also need to splice wires if you ...

This is the primary cause of trailer-light problems. Symptoms include flickering, fast-blinking, dimness, intermittent operation (often when a trailer ball is used for a ground), and complete failure.

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Replacing a broken taillight on my trailer reminded me of just how much I like solder ...