nthaworx

I installed Ls1 electric fans on my 99 rcsb today, I used the harness from ls1fans.com.. Great kit. It requires tapping into the a/c trigger wire and pinning the #42 pin on the pcm harness, after following the steps to a T, I cranked the truck up and the fans instantly came on, and ran constantly.. So I'm stumped to what the issue could be, any help or ideas would be appreciated!!

2xLS1

iTrader: (25)

You don't mention anything about programming your PCM for fan control. What color connector did you wire pin 42.

nthaworx

I used the blue pcm connector closest to engine. And pinned #42. And the fans have been turned on. in the pcm via hptuners

SSZ

Sounds like you may have to make some adjustments to the Fan System settings with your Hp tuners. WOuldnt be surprised if thats where the problem lies.

nthaworx

You're probably right. I'll have to get my tuner to check and see if he looked Ovre something

SSZ

Any updates?