What year is your truck, and what year/ model was the junkyard donor vehicle?
Well there's your problem. S10 wiring changed on a weekly basis....or at least it seems like it. Get one from rock auto or the same year/model as yours. What's the male side of the connector look like? I'm seeing some differences in yours vs this one from rockauto.94 is mine and 98 at the junkyard
The connector the new one plugs into.The brake switch...should have been a bit more clear. Been working outside and it's just short of 100*The top picture is the old connector and the bottom is the new