I know I can use an HDMI source like a Raspberry Pi and a small screen for HDMI and could twist copper cable together and measure continuity through them to narrow down which is which but I’m wondering if there is an easier way. Maybe something I connect to either end?
You’re question sounds like you are running the wires. They make numbered stickers specifically for marking long pulls of wire so you don’t have to test them. Just wrap a number around both ends and voila. https://www.amazon.com/Gardner-Bender-42-029-Booklet-Identification/dp/B000VZM37C?dib=eyJ2IjoiMSJ9.ovuOUGMUj8C_DNFC00PsO15E6OyQQs4s4YRCRQ5SIvBh8TpdDH5nLU03qL-42bh-oOJCoVFYwVtUPeQlqhKnzvZMXHJ9RhzUumZprTY0Mrg_DQ7DSGe0DRcclV3BjnXeXLgg2Ko7AcPG_HShb6wik2ckoe52dNfzxqzSttiSrLzwENDsAQBJxsJx8g9lw-2GsDbb2IobpirvO78ZRERnIA.ZX5nJbb1fav8j3hRfA9xqgHVaHZf91iFrAY574w2q8k&dib_tag=se&keywords=wire+number+labels&qid=1731039683&sr=8-3
I just stick a 9v battery on two wires on one end and then test for the voltage with a voltmeter on the other end. If I need to sort out multiple wires, I just feed different low voltages over different wires and test at the other end.
It’s always worked for me :). Wire is wire, as long as you don’t try to run higher wattage over it than it can handle.
I’d just get a couple colors of electrical tape and wrap it around the ends
