Has anyone successfully installed an aftermarket fan override switch while still utilizing the “correct” bits, like an (updated) thermostat and relays? I only have experience with a straight-shot override, bypassing any relays and such. But my bf is trying to do his “correctly” and we’re stumped with the issues we keep encountering. I could use some assistance troubleshooting his baby (2009 Mazda3 Turbo), hopefully while he’s away, enjoying himself for the weekend. 😇😇 He set it up according the the diagram that was sent to him, but I swear it’s a messed up layout....