For the light to be controlled by a switch that s separate from the fan the wiring between the switch and the fan unit needs a fourth conductor a red wire to carry the hot feed for the light kit.
Wiring ceiling fan with light red wire.
Connect the red wire from the fan to the other terminal on the fan switch and the black wire to the light switch.
If your ceiling fan does not have a light fixture then simply cap off the red wire and attach the fan motor to the black wire.
In other words it is the primary connection that provides current from the switch to the fan s electrical load or motor.
To do this method the wire from your wall circuit to your light has to have 3 wires.
In the switch box.
A red wire up in the ceiling fan junction box usually indicates that the wiring has been installed which provides separate switch for the light and a separate switch for the fan motor.
Connect white wires together.
The red color on fans is for powering the lights.
Connect the blue wire to the red wire.
Connect black fan wire to the black ceiling wire.
Ceiling fan capacitor connection internal wiring of a fan.
It is a hot wire that comes from the ceiling and hooked up to a wall switch.
You may come across a red wire when wiring a ceiling fan with 4 wires.
Twist all the white wires in the box together and cap them.
Make a pigtail of the ground wire using two 6 inch lengths of bare wire and connect one ground wire to the fan switch and one to the light switch.
Therefore we have the method to determine it with a digital multi meter.