1/2 round connector has 7 wires in it. wire 1 is 12 ga dark blue----wire 2 is a double wire 18 ga dark blue w/tracer---- wire 3 is 14 ga pink w/tracer---- wire 4 is 14 ga red----wire 5 is 14 ga light blue----wire 6 is 14 ga orange----wire 7 is 14 ga light blue. wire 1 goes thru bulkhead cavity #4 to fusible link. wire 2,double blue w/tracer, goes to park brake switch and then forward to cavity 14 in bulkhead and goes to 6 way under hood that goes along frame to rear of truck. wire 3, 14 ga pink w/tracer, is cavity 13 in bulkhead and also goes to fuse link. wire 4, 14 ga red,tees off to fuse box and cavity 2 in bulkhead and goes to voltage reg. wire 5,14 ga light blue, tees off to fuse box and wind shield switch. wire 6,14 ga orange,cavity 28 in bulkhead and goes to starter relay. wire 7,14 ga light blue w/tracer goes to fuse box. good luck.