How to overide fans???

[BlackRat]

I have dual spal fans on my Dewitt radiator. Each goes to a seperate relay. They are triggered by a temp switch in the intake. I want to first wire in a light so I know when the fans come on and second wire in an overide switch so I can manually turn the fans on at will. Can any of you ex[plain\show me how I can do this?

Thanks
Wade

 

[mrvette]

Yes, but you need know how to read a electronic part, called a diode..it's a one way SOB...the striped end goes to the switch....two diodes, both striped ends to the same switch end...the other switch end/pole to ground/frame...that will turn on both relays at once...the UN striped end of the diodes go across the switch/senders that would normally energize the relays, and turn on the fans...so it's either/or with my setup...any lights go directly across the relay coils....OR, you could run extra wires and run the lights directly across the fan motors....