4.7 ohm is not a small resistor!
Sounds like you are describing a pull up, if we assume 5 volt supply voltage, and you ground the signal, you will be pulling a bit more than 1 Amp through the pull up resistor, or about 5 watt.
A fitting size would be so where between 1k and 10k if intended for a pull up.
Bok101 t1_iva99po wrote
Reply to comment by Hattix in How to bypass solar light's radar sensor to stay on indefinitely? by ThatFooFooLameShit
4.7 ohm is not a small resistor! Sounds like you are describing a pull up, if we assume 5 volt supply voltage, and you ground the signal, you will be pulling a bit more than 1 Amp through the pull up resistor, or about 5 watt. A fitting size would be so where between 1k and 10k if intended for a pull up.