In spite of continued improvements in alloy trailer wiring and electrical components, wiring problems can occur if regular maintenance is avoided. Many of the problems we see with a trailers electrical system stem from the conditions under which many trailers are operating in. Under gravel road conditions the underside of the trailer is being bombarded by an abrasive mixture of sand and stone (gravel). The trailer is literally being sandblasted. This sandblasting effect can damage the wiring underneath the trailer. The most common problems are with the electrical wires coming out of the electric brakes. It is important to inspect the wiring on a regular basis.