I recently completed a gen3 swap into 83 c10. Engine and ecm are out of 2000 1500 .I have a single fan set up. I have relay wired to pin 42 per lt1 amazing website. It turns on when it should .The problem im having is the ground signal from ecm is a pulsating ground instead of a constant,causing the relay to click on and off every other second. I've played around with the settings in fans on tuner, no luck. I was hoping someone here had advice ? ty