Redundancy is our friend. The relay on our stock light switch is to turn off the lights when starting the motor. The load on the stock ignition switch contacts for the light circuit is a weak design and will leave you high and dry. The H4 kit takes the load from the ignition switch and moves that load to the relays of the H-4 circuit. By only using contacts in the ignition switch to power the magnets in the H-4 kit relays, not the headlights. The contacts in the ignition switch should last forever after the H-4 is installed. Hope we are talking about the same thing.