Hi, just joined today. I have a question about the 2 speed wiper switch. I'm customizing my dash, new gauges and switches and ran into a head scratcher. I have all ron francis switches including the wiper switch. I don't have an original one to reference but the ron francis one has a (B) battery (P) park (L) low and a (H) high terminal. I know how the wiper works, low goes to the resistor and then to the L terminal, High goes directly to the H terminal and then the park goes to the gearbox switch P1 which is where I'm lost because I would think you could just come off P2 to the resistor for the park. My old harness had 4 wires, What is the 4th wire for? I have a manual that shows everything except how the factory switch works but does mention a circuit breaker between B & P1. Any thoughts