I unhitched my trailer and unplugged the lights. I pulled up and then checked and I guess my trailor wires caught on something on my truck and it stretched them out. The only wire that was damaged was the blue wire. I think think that it is the surge brake wire. My question is - can I just splice the wire and wire it back together? The wire tore out under the tonge of the trailer and it looks like it tore right where a wire clip or connector was. IF I wire it back how will I know if the brakes are working? Thanks in advance for replies. Keep in mind I am a terrible mechanic.