Roadmaster Hy-Power Diode - 2-Pack|792

Diodes are frequently used in wiring kits to prevent the backflow of current to the electrical system of the towed vehicle or motorhome. However, many newer vehicles now use a multiplex wiring system, whereby multiple electrical signals may be sent down a single wire (brake and taillights, for example). This is called variable voltage. If your vehicle has variable voltage, you need Smart Diodes instead (sold separately). Hy-Power Diodes are used to tie into the towed vehicle’s brake light, running light, and turn signal wiring, and connect it to the motorhome. Diodes permit electrical current to flow in only one direction – from the motorhome to the towed vehicle’s taillights – preventing electrical feedback and the damage it can cause to both vehicles’ electronics. If you’re using a diode, why not use the best? Roadmaster’s Hy-Power diodes have a heavy-duty aluminum heat sink, and each diode is protected against the elements – all components are housed inside an epoxy-sealed powder-coated aluminum case.