West4x4 Posted January 22, 2023 Share Posted January 22, 2023 Dragging up an old topic. But how are people doing the wiring for this? Quote Link to comment Share on other sites More sharing options...
western Posted January 22, 2023 Share Posted January 22, 2023 Joined in to the original blower motor wiring, so both fans run. Pretty sure wiring isfiscussed within the thread. Quote Link to comment Share on other sites More sharing options...
West4x4 Posted January 22, 2023 Share Posted January 22, 2023 3 minutes ago, western said: Joined in to the original blower motor wiring, so both fans run. Pretty sure wiring isfiscussed within the thread. Found the fan runs continuously connected to purple feed to heater. How is the existing switched earthed? Quote Link to comment Share on other sites More sharing options...
West4x4 Posted January 22, 2023 Share Posted January 22, 2023 Ok I think I’ve realised how it works. The other 2 wires green/slate green/yellow go back to the switch to earth. I can connect to both wires and it will earth depending on which position the switch is in? If it’s connected to one it will only work on one of the settings? Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 22, 2023 Share Posted January 22, 2023 The switch has two positions (plus ‘off’) and the common side of it is connected to 0 volts (ground). The switch position determines what low voltage connection the motor sees (it has the higher, +12 volt connection on the other terminal). When switched to the first position, the connection to 0 volts from the motor is provided through a resistor. This means that the motor doesn’t ‘see’ the full voltage across its terminals and runs slow. In the second position, the connection to 0 volts is direct from the motor and so all the voltage is available at the motor and it runs at full speed. Quote Link to comment Share on other sites More sharing options...
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