David Paul
Full Access Member
I did the efan mod on my 2004 Tahoe. Using the fans and harness from a Silverado, 2006?. In checking the operation, when I ground the green wire (temprature) both fans come on low. Check.
When I ground the blue wire (AC) the drivers side fan comes on high, passenger side off.. Humm, I thought it should be the passenger side. I believe they can only be plugged in one way.
When I ground both, the drivers side comes on high, passenger side is off. I thought both were suppose to come on high.
I'm thinking it might be one of the relays so I swapped the 2 that I could, no change. Not sure how to check the relays other than that.
Any ideas? All fuses are good and the wiring harness appers in good shape.
TIA....
When I ground the blue wire (AC) the drivers side fan comes on high, passenger side off.. Humm, I thought it should be the passenger side. I believe they can only be plugged in one way.
When I ground both, the drivers side comes on high, passenger side is off. I thought both were suppose to come on high.
I'm thinking it might be one of the relays so I swapped the 2 that I could, no change. Not sure how to check the relays other than that.
Any ideas? All fuses are good and the wiring harness appers in good shape.
TIA....
