I’m going to be using relays on my H-4 halogen conversion reflectors and also converting to 12v with a total rewire in my ‘37. Let’s see if I have this correct. Fusebox power to the light switch, light switch then goes to the dimmer, which splits it two directions (high beam/low beam) then it goes to the relays, then to the headlights. I have a few questions. #1 does each headlight need its own relays ( high/low) for a total of four relays? Or just two relays, one for highbeam one for low beam and series wire to the two headlights? #2 Considering the H4 draws 65 W Should they be wired parallel with their own relays anyway? #3 would the single box with six relays all protected and mounted on the firewall recommended or all individually mounted relays better? #4 my simple mind is swirling with logic and the question, why are the 5 pin relays all SPDT when I am wanting it to control one circuit each? I’ve wired a lot of houses and understand KISS circuits such as power in, power out and grounds completing the circuit.
