Cooling fans with No Air Conditioning
My RamJet 350 24x conversion required me to change out my mechanical clutch fan for clearance reasons with the intake piping. I am using a LS1B, 2001 camaro manual calibration with OS 12202088. No A/C in this FJ40! I wired C1 42 to control fan 1 relay, and C2 33 to control fan 2 relay. My fan is a single two speed Derale. My thought was "Fan 1" for low speed, "fan 2" for high speed. The setup worked great on the bench manually triggering the relays. I went through the calibration and set the fans to Series, then in Engine DTC set "Not Reported" and "No MIL" ed all the A/C stuff. Got "clicking" on the relay, fan ran but relay was getting really hot. Swapped in several different relays (old 5 pin kind), same thing. I am thinking it has something to do with the A/C parameters, but dont have a clue. I didnt pin any AC stuff on the PCM so maybe something A/C needs to be grounded to fake A/C????? Changed the calibration to Single fan, now relay "clicking" is gone, but now low fan runs upon engine start and wont shut down, while high speed comes on as calibrated. Does the ls1b output a PWM signal which is causing the relay rapidly clicking on and off?? Thanks for help!
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