Installing 06 Chevy E-fans on a 01 Chevy
#31
Custm2500's Rude Friend
iTrader: (17)
this is exactly what i was looking for... awesome write up and thanks for the info...maybe im just an idiot but i heard that you had to get the computer programmed to trigger the fans...i have a 2002 and can get my hands on a few different scan tools and if it does have to be programmed id like to know if i would have to send it out or if i could do it with a scan tool
#32
TECH Junkie
iTrader: (40)
When you guys are measuring the radiator are you measuring just the core? I just bought a 04 Sierra SLT and need to do this swap ASAP, my fan clutch is weak and needs to be replaced.
My core of my radiator was around 29", from end tank to end tank was close to 34"..
By what I have read I should have a 31" but can someone confirm the way you are measuring to determine this for sure?
Thanks,
Jarod
My core of my radiator was around 29", from end tank to end tank was close to 34"..
By what I have read I should have a 31" but can someone confirm the way you are measuring to determine this for sure?
Thanks,
Jarod
#33
Great write up but one thing where on the radiator do you measure to determine if its a 28" or a 34". If i measure inside the radiator ends (just the core) its 28" if i measure from out side to outside its approx 34" any help. Thanks
#34
On The Tree
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i did the install exactlly. when i hook up battery fans come on high, right side only. is this a problem or will the tune change it? is pin #42 grounded all the time now till the tune?
#35
TECH Junkie
iTrader: (40)
Once you pin the computer and program it this will all take care of itself.
While I was waiting on my tune I twisted the green and blue trigger wire together and ran it to a switch in the truck and switched the fans on when I was driving and turned them off when I parked the truck.
Last edited by 00pooterSS; 06-07-2012 at 04:22 PM.
#36
well after re-reading the thread and mulling over the wire diagram i have some questions lol.
#1 it says in the thread that the ac relay controles the high speed (one fan high) and the computer controls the low speed (two fans on 1/2 speed), first that means you would be moving about the same amount of air no mater if its on low or high, so do trucks from the factory only have the "2" speeds
#2 what does the factory turn on when the ac is activated (both high, one high, or both low) and what does it turn on due to the coolant temp (im guessing that's how they would do it)
#3 wouldn't it make more sence to have the ac turn on one full speed(or both on 1/2speed and then have the computer/ temp turn on both on full or is there something im missing about how it turns on the speed
#1 it says in the thread that the ac relay controles the high speed (one fan high) and the computer controls the low speed (two fans on 1/2 speed), first that means you would be moving about the same amount of air no mater if its on low or high, so do trucks from the factory only have the "2" speeds
#2 what does the factory turn on when the ac is activated (both high, one high, or both low) and what does it turn on due to the coolant temp (im guessing that's how they would do it)
#3 wouldn't it make more sence to have the ac turn on one full speed(or both on 1/2speed and then have the computer/ temp turn on both on full or is there something im missing about how it turns on the speed
#37
The way it works when it is wired up is as follows:
-If the AC is on,(and coolant has NOT reached 209 yet) one fan turns on
high speed.
-If the AC is off, both fans turn on at low speed when the coolant gets to
209 (or whatever temp you have them set to turn on at).
-If the AC is on AND the coolant is up to temp, then BOTH fans will run on high.
So in a nutshell, on wire triggergs one fan on high, one wire triggers both on low, and both triggers together trigger both fans on high.
-If the AC is on,(and coolant has NOT reached 209 yet) one fan turns on
high speed.
-If the AC is off, both fans turn on at low speed when the coolant gets to
209 (or whatever temp you have them set to turn on at).
-If the AC is on AND the coolant is up to temp, then BOTH fans will run on high.
So in a nutshell, on wire triggergs one fan on high, one wire triggers both on low, and both triggers together trigger both fans on high.
#38
TECH Junkie
iTrader: (40)
The way it works when it is wired up is as follows:
-If the AC is on,(and coolant has NOT reached 209 yet) one fan turns on
high speed.
-If the AC is off, both fans turn on at low speed when the coolant gets to
209 (or whatever temp you have them set to turn on at).
-If the AC is on AND the coolant is up to temp, then BOTH fans will run on high.
So in a nutshell, on wire triggergs one fan on high, one wire triggers both on low, and both triggers together trigger both fans on high.
-If the AC is on,(and coolant has NOT reached 209 yet) one fan turns on
high speed.
-If the AC is off, both fans turn on at low speed when the coolant gets to
209 (or whatever temp you have them set to turn on at).
-If the AC is on AND the coolant is up to temp, then BOTH fans will run on high.
So in a nutshell, on wire triggergs one fan on high, one wire triggers both on low, and both triggers together trigger both fans on high.
I got an entire front end harness from the junkyard for $30, got a set of used fans for $100, and bought a brand new 34" radiator for $150. It was well worth it to have a fully computer controlled and completely factory looking setup.
I have a 2004, so I was able to get the truck tuned to control it all.
#40
Great write up, helped me a lot with my install, just waiting on a tuned pcm now, I have two questions though as I'm not done just yet.
What do you do with that first plug on the harness? I have an 04 SS and don't have anything for it to plug into.
The two black wires at the end of the harness, those are just grounds right?
What do you do with that first plug on the harness? I have an 04 SS and don't have anything for it to plug into.
The two black wires at the end of the harness, those are just grounds right?