So,

I'm dealing with a seized fan clutch and was thinking about switching to an e-fan setup. 
Probably getting a flex-a-lite, there's the Taurus fan but they cause a big A spike on startup.

I could just go with a one relay temp probe system but why do simple when you can overcomplicate things right??

So the plan is to be able to switch between always ON, Auto and always OFF plus an A.C. override.
Always ON is always ON duh
AUTO is switched on by temp probe but when A.C. is on fan is always ON
OFF is off.

Now I also want to incorporate a big red LED when it's turned off and a green LED when the fan is running (actually running and not only when it's relay is activated in case a relay malfunctions)
Always ON -> GrnLED always on
Auto --> GrnLED on when fan turns on





So I made up this little circuit, does it  make any sense?
Consider the two SPDT's top left as a DPDT on-off-on with the OFF not pictured
Is there a simpler way to do this?(there probably is)


Now this is with "external" LED's that I'd have to integrate in/around the switch/switchpanel but that's going to become bulky and is a bit oldschool.

In come illuminated rocker switches but how do I wire that so when the fan is OFF the switch illuminates red? Ideally then I'd also want it to illuminate in the ON/AUTO positions (I found some dual color rockers) or maybe just always on.
Flex a lite sells a  rocker switch thats red when off , no light on auto and blue when on but they want 70 (yes seventy) USbucks for it and it probably onlg works with their $170 controller.

So here I am, overthinking things and curious about advice from the wiring specialists on here.

Oh and there should be a fuse before the fan of course forgot to add that in the diagram

Edit: and now I see that the 12v for the LED relay shouldn't come straight from battery of course but an ignition 12v or something or the red LED will be on all the time with the truck turned off.

Last edited on Mon Jan 25th, 2021 08:53 pm by Arthur