Hello everyone, My brother and I recently mowed a lawn for a customer and we ran into a problem. We had mowed the lawn around 10 in the morning. Later that night the customer called to inform me her A/C was not operating. I knew exactly what had happened. While my brother was trimming the 3ft tall grass around the A/C unit, he accidentally hit the exposed wiring coming from the ground and going into the unit. When I say exposed, I mean you can see the colors of each wire, with no protective cover of any kind. Some wires were bare and the wire nuts were brittle and broken from being exposed to the weather. That being said, when the weedeater got a hold of the wires, one was pulled loose, thus turning off the A/C. After receiving the call about no A/C I immediately went to her house and connected the wire (green wire to green wire) and then came back home. The next day around 1 I get a text saying that the A/C is still not working and she will call a repair man. I knew that meant she was going to expect me to pay for the bill. My brother and I went back to her house to find out that someone had altered the wiring and removed a section that had been used as an extension (probably from a prior weedeater incident by the homeowner.) Now the wires are completely altered from what I had seen the day before. The customer stated she had a friend try to fix it and that she was connecting wires while the power was on. She made the statement that the A/C was working AFTER her friend "fixed" the wires, but then it quit. When I questioned her statement I asked, "So your friend got it to work, then it quit again?" The customer stated no, that it hasn't worked since we hit it the other day. My brother and I were unable to determine the proper wire configuration so we left. The customer sends me a message today stating that the amount we owe her for the repair bill of a blown transformer is $245. She made sure to add, "Which was caused when your brother hit the wires." Here are my questions: 1.) Are we at fault for hitting her bare, unsafe and exposed wires that are obvisouly not up to code? 2.) Would hitting the wires with a weedeater cause the transformer to blow, or could it have been her friend that was attempting wiring configurations with the power still on?