ok, post #4 tells me to "To see if the Delta P switch is the cause of the illuminated warning lamp(s), disconnect the two-wire connector (on the Delta P switch) and jump the two wires together."
but there is no 2-wire connector, the only connector has 4 wires, (at the combination valve). Otherwise I don't know where the Delta P switch is, and it is not at the Master Cylinder, mine is a 1997. The only connector at the master cylinder is a 3-wire connector at the bottom center. (for the fluid level switch).