sum guy

iTrader: (4)

Like the title says I have a 99 truck pcm and I am trying to wire a high and low fan with it. Tuned the pcm to use both. Wired it like the camero: Blue connector pin #42 for low fan and red connector pin #33 for high fan. My low fan comes on, works great. The high fan pulses ground at all times, truck uses that pin for recirculation door. So my question is what pin would power the high fan on a truck pcm? Thanks for any help

sum guy

iTrader: (4)

Posted this in Converions and hybrids and got this helpful response. "Your PCM operating system is still setup to control the air recirc door. If your using HPTuners to tune it go to system>A/C>recirc option and set it to fan #2 instead of AC Recirc. Your wiring is correct, its the PCM tune thats off."

Problem is when I go to Systems then AC I only have the option to disable rpm and tps for AC, which I set all to 0. Could not find a place for changin recirculation door to fan. What am I missing here?

2xLS1

iTrader: (25)

You have to be usibg the 2.23 beta version of HP Tuners to see it.

sum guy

iTrader: (4)

Wow! Thanks. I would have never guessed that. I will check with local tuner tomorrow and see if they have that capability. Thanks for the reply.