Diode, Hy-Power 3-Pk

By preventing electrical feedback, Hy-Power diodes allow you to splice into the towed car's wiring system without damaging expensive electronic dash components. Reduces wiring hassles for trouble-free operation for all vehicles. Heat sink dissipates heat. A heavy-duty 85-amp rating. Simplifies wiring. Comes in a two pack, 4 required for most vehicles.