17 Pics about service owner manual : November 2012 : 16+ 2005 Chevy Trailblazer Electrical Wiring Diagram - Wiring Diagram, Pin on okok and also 2002 Chevrolet Trailblazer Wiring Diagram - Wiring Forums. I cant have the 07 OS loaded into my ECM as it will lock me out of the ECM which will render my HP Tuners useless.Service owner manual : November 2012. Right now I have the fans on a manual switch, I plan on ordering a controller today just in case there ends up being no other solution to the situation, They truck got all the way to 210 degree last night and they never came on.Īny other suggestions, I am not trying to go around Alvin but the more hands and or suggestions that can help me get the fans on the better. I dont want anything lower than the ecm either, but I do know that without a PWM module there is no way a set of LS1 fans are going to work if they are set to PWM Electric in the ecm, this has been confirmed already by me several times.Īlso none of the tunes Alvin has made up so far have worked, with or without A/C. I tried GTO tables as I had a GTO before the TBSS, those didnt work nor did any of Alvins tunes he has sent me.Īt the moment I am a test subject on tis which I dont mind but I need the truck to drive to work and Alvin has a car show this weekend and probably will not have enough spare time to help me out right now. This is why the clutch fan takes so much power to run - working above 30MPH to deliver over 10,000CFM in extreme high load, like mountain pass trailer towing with high air temperature ,110+ degrees, conditions. The CFM of the efans tops out at around 5000CFM. Think of 2 square foot of radiator at 60 MPH, number of feet in a mile 5280 =10560 CFM at 60. (And unless you are towing a big trailer, fans are generally not needed at speed.) The airflow over the radiator exceeds the CFM of the electric fans quickly. Problem is at 30MPH+ electric fans are useless. If you want a lower temp range you will have to do something else like a hard wired temperature sensor etc. The E67 ECM is on the 2007+ TBSS and the fans work as far as I hear, but the setup is different than the E40 ECM. Yet, the E40 ECM runs efans on the GTO and Corvette. The E40 and E67 ECM on the TBSS did not have efans from the factory. You can also turn on the AC and see if the fans kick on - by the kit design. Sometimes a computer will freek if the bottom of the scale is at the max. I would leave a 0 in 192 and start the settings at 196 and warm then engine up to 196- just to test it for working properly. The E40 2.5 bar custom OS would rescale the fan temps - if you had a 2006. Sounds like you want a lower temp then the factory ECM will handle. He also takes the time to answer all of your questions. I would get ahold of Alvin, he knows what he is doing and generally gets back to you to answer questions. Otherwise I am going to have to go old school and use a switcha nd relay to control this setup which I dont want to do as i would rather have the ecm control the fans. Here is the file I was sent and the one I have in right now. Anyone got any ideas?Īt the moment I am not worried about key off fan opertation, only key on and with or without a/c operation. I have a 160 thermostat in the truck and would like to stay in the 170 range or so, but so far I am stumped on this. I need to know what I have to do to get the fans to come on at the lowest setting (192 I know this much) and run at 100% for the entire time they are on. If they are left in PWM mode only one fan will come on and it will pulse badly. I have found the fans will only work if set to "Discrete" in the fan settings at least. That works as far as I can tell as I can trigger the fans tru the VCM scanner at least. I was instructed to use pin 49 on the J3 connector on my harness. He set the Efans in the ECM to "PWM electric" with 3 fans even though there is only 2 fans but they are wired to seem like 1 fan thru two relays that start 1 first, then 10 sec later the 2nd fan comes on. The ECM patch I got from the vendor is not working as it seems the 2008 TBSS uses the E67 ECM that did not have Efans on it from the factory. ![]() Ok here is my deal, I got a wiring harness and a set of LS1 fans (dual setup)
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