ok my trucks got issues sigh oh well but anyways heres basically how it goes i got my exhaust done awhile back and i'm tired of the check engine light the truck has a post o2 sensor so without a working cat the check engine light kicks so i bought an o2 simulator to make up for this and i have no idea how to hook it up theres 3 wires on the simulator and 4 wires on my o2 sensor does anyone know how to hook one up? if u could show me a diagram or something showing what wire goes where it would be verry helpful thanks!