Dorman 902-310 Radiator Fan Relay Kit HZ setting
 

Connected the fan relay kit to a set of stock ls1 Camaro fan. when the PWM wire is connected, the fan motor makes an unusual noise, like an electrical signal noise, but no moment. I'm sure its a HZ hertz setting. if i ground the signal wire, it goes full speed. So it seems the relay is operating properly, just not the signal no jiving.

stock L83 is 100hz . Instead of trying a bunch of ranges, I figured i should post up and ask the mass'.

Thanks
Clint

Re: Dorman 902-310 Radiator Fan Relay Kit HZ setting
 

I'm thinking this thing is just a dud, when grounding the signal wire, it was not full speed as i thought. its maybe 1/2 speed by the sound of the roaring noise of the fan noise. May warranty this unit, at this point I'm not sure

I did set the ecu to gen5 ecu fan setting to pwm_electric and 128hz per notes in hptuners and nada. noted that when turning on fan relay 1, it activated it. but it activated it at the original observed speed, 1/2-ish.
clint