Hi guys. I have a question, so I’m currently doing an Ls1 swap with a t56, and I’m trying to make my fans turn on. I’m running 2 electric fans with stock thermostat 2 relays control by pcm. My first attempt engine temperature went to 230f and fan’s didn’t turn. 2nd attempt I program the pcm to turn on low fan at 180f and turn of 190f, but had no luck but if I turn them on with laptop (hptubners) will turn on and off. If anyone here have experience this problem or have an idea please let me know. Thanks in advance

 

Could be because your on setting is lower than your off setting. I usually program them to come on at 200 and off at 190 they pretty much just stay on once up to operating temp.

 

I have fan 1 to turn on 195 off 185
fan 2 on 200 off 190