Hello all. I have a 2012 jeep grand cherokee overland 5.7 with a new crate engine from eagle in florida. I'm needing a wiring diagram to run a cooling fan switch when in congested road way stops. It gets up to 226 degrees and I don't like it. I have the non towing package so I guess its the 4 wire fan wiring. I have the relays, wire and switches to do it right but I've been reading conflicting ways of doing it. I have a new radiator and installed a 185 degree t stat. I understand a tuner can... Cooling fan switch install