Nelson e-fan harness?
05-15-2009, 06:40 PM
#1
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Nelson e-fan harness?
I need to know if the Nelson e-fan harness is good enough to run 05+ e-fans and is it as quite as the oem set-up? I have heard that the Nelson Harness is not good for the 05+ fans, but made more for the LS1 fan set up?
05-15-2009, 06:44 PM
#2
I've been using the Nelson harness with my 05 efans for a few years now with no problems. Only difference in that harness between the 05 and LS1 fans is the connectors that go to the fans. I'm not sure how the fans sound in factory form, but my fans don't sound any louder than any other efans that I've heard. When they're commanded on by the PCM, with the AC off, they run on low and I can't even hear them at all. At high fan speed I can hear them at idle, but once I get moving the sound of my engine and exhaust drowns them out.
05-15-2009, 09:40 PM
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I've have heard many 05+ stock fans and my low speed sound like their high speed? Just wondering if i can get this with an aftermarket harness with trouble free issues? Will the Nelson harness be ok trouble free and be quiet? I can hear my wife's Denali fans on high from about 100yds out! Just sick of trying to make this mod work right!
05-15-2009, 11:04 PM
#4
My harness has been trouble free (knock on wood)...I've read of a few guys having problems with the relays, but that's about it. New relays are a cheap and easy repair though if they give you a problem. What harness set up are you using now and how does it control high and low speed? I believe that the Nelson harness uses the resistance of the one of the relays for low, and goes straight through the contacts only for high. I'm not 100% sure, haven't looked at a schematic for the harness in a while (the schematic has been posted around here for a few times). As I mentioned, when my fans are on low, I can't even hear them, the small factory fans in my wife's 03 Toyota Matirx are louder. There's no doubt when the fans come on high though, and I don't see how that could be much different than the factory fans on high, as it's just straight 12 volts (or 13ish to 14ish while the engine is running actually) with the Nelson harness. I would imagine that the stock set up would supply the same voltage for high fan operation. I've never heard the stock fans in an actual 05 truck though, so I have nothing to compare to.
05-16-2009, 10:32 PM
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05-18-2009, 09:00 AM
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I've have heard many 05+ stock fans and my low speed sound like their high speed? Just wondering if i can get this with an aftermarket harness with trouble free issues? Will the Nelson harness be ok trouble free and be quiet? I can hear my wife's Denali fans on high from about 100yds out! Just sick of trying to make this mod work right!
Please explain...