Relay acting oddly

I'm using a JQC-3FF-S-Z relay that came in a kit with some soil moisture sensors and a submersible pump. I'm able to switch an LED on and off using the relay however when I connect the pump to the load side of the relay it begins switching on and off very quickly.

I thought at first the pump might have been drawing too much power so I isolated the pump using a separate power source and its still acting odd, im pretty stumped.

Has anyone encountered a problem like this? Is my relay defective?

@ottawatech

Could you take a few moments to Learn How To Use The Forum. Other general help and troubleshooting advice can be found here. It will help you get the best out of the forum in the future.

As it stands there is not really enough detail in your Q.

Links to kit etc etc.