First, find the break in the wire. Once you have found it, use a pair of pliers to twist the wire back together. If it is a big break, use electrical tape to cover and hold the wire together. If it is a small break, then you can use duct tape. After you have repaired the wire, re-attach the battery pack and turn on the power. Your fence should now be working again!

If you're having trouble with your underground fence, the best thing to do is call the manufacturer or a professional electrician. They should be able to help you troubleshoot and repair the problem.