Hi friends, One of the three radiators fans of my 412 is running non-stop. The three fans have individual relay and fuse. When I remove the relay of this one he continue to run, but when I remove the fuse of this one, he stop. Do you have an idea about this mystery ?
Which relay are you removing? G, H, I, or J? I don't have a 412 wiring diagram, but (based on how other F systems work) you could remove relay G, and the RH radiator fan would still run when the coolant is hot. However, your comment: "One of the three radiators fans of my 412 is running non-stop" sounds like someone has made some wiring modifications -- unless you have the AC "on" (then the RH radiator fan should probably run even when the coolant is cold).
Dear Steve, I've the wiring diagram, cheked the relay matching with this fan. But, my son Vincent yesterday evening look at the car and solved the problem!! : the AC was "on"! Shame on me and my stupidity ! Now all work fine. Excuse me again ! and thank you again for your kind reply. Herve
No worries, Herve -- we like easy fixes like that . Some F models have more of a history of overheating troubles (so the fan wiring can get modified/messed with as an attempted "solution"), but I wouldn't put the 412 on that list (so your initial post surprised me some).
