Only one schematic on that truck shows the relay. One wire goes to a three wire chassis plug but I cannot find anything else on that plug in any of the schematics. The wire colors and relay positions and connections are, White wire, pos 30, from starter solenoid, lt blue and pink,87a, starter lockout,12 volts when cranking,pink and tan, pos 86,comes from fuse. It could be the ign switch holding power on the relay for the time frame, or could be the start side holding power. Hope that helps some.