got a wiring diagram? across that diagram there's a line that's labeled "front of dash", beyond it the headlights, that diagram is laid out exactly like the truck, facing the dash you can see which wire goes where .... easy
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics