Did you get a voltage at the led? I thought about it later and it slipped my mind that led’s use pwm signals and im not positive if the pwm voltage can be measured with a meter or if some meters can and others cant.
I dont mean any offense here but, you do know how to use your meter and which settings you need to use for different things? Some meters you have to change how the probes plug in depending on if your measuring AC lr DC and some you dont.