Diodes are used to tie into the towed vehicle's brake light, running light and turn signal wiring, and connect it ot the motorhome. Diodes permit electrical current to flow in only one direction - from the motorhome to the towed vehicle - preventing electrical feedback and the damage it can cause to the towed vehicle's dashboard electronics. ROADMASTERS Hy-Power diodes have a heavy duty, anodized aluminum heat sink, and each diode is protected against the elements--all components are housed inside an epoxy-sealed, anodized aluminum case. Four pack required for most vehicles. Includes detailed wiring instructions.

4 pack