efans

[creekrat]

I have a 5.3 and 4l60e dbw from a 2005 chevy pickup that I swapped into my 93 gmc. I am putting efans and am having some issues. The engine didn't originally have efans so I pinned the blue connector at pin # 42. Is that correct? Also, does the ecm pull a ground for the fan or does it send 12volts to the relay?

[BigCE]

Yes pin 42 is correct on the Blue Connector and it supply's a ground to be used with a relay.

[creekrat]

thanks. for some reason mine is not switching ground. i can hook up the tune scan tool and go to DVT (F12) and manually request the fan and when i check it with a multi meter it is not showing that it is grounded

[derkscustomcars]

Make sure you set both fans to auxiliary when tuning the ecm.

[Level2]

You may need to update the software in the PCM. I had this happen this week, see my post on the Gen III Page.

[Chevy366]

Odd because in 05 the 5.3 equipped pick-ups had e-fans standard, I know because I put e-fans on a 05 1500 HD [which did not have e-fans standard] and used part numbers off a 05 5.3 equipped truck to get the stock harness necessary to do the e-fans.
Yes ground as stated above, as also stated, fan settings not set correctly in PCM, should work with no problems.