Where can I send a PCM to get the E-fan pins turned on??
#1
Where can I send a PCM to get the E-fan pins turned on??
My 18 year old son has a raggedy 99 Silverado that I am helping him slowly fix up. He scored a set of electric fans from a local junkyard, but he obviously needs a tune to have the PCM control the fans. We discussed using a temperature switch on the coolant hose, but I think the PCM controlling it would be much better. I have a Blackbear tune on mine, and I have the temperature pin wired to pin 42 on the PCM, and the AC trigger wire spliced into the positive AC compressor wire. I figured I could wire his the same way, as mine has been working perfectly fine like that for 7 solid years now. He doesn't have a tune, nor does he need one (not any time soon at least). So is there a place that I can send his PCM and they will ONLY turn on pin 42 for the Efans? I remember seeing a website somewhere that said they can do it for about $65 or $75 or something like that, but I can't remember the name of that site for the life of me. So if you guys know of someone or somewhere that will do it for CHEAP, please let me know. Thanks.
#2
Truck Sponsor
I can take care of that for you and also do some basic tuning on it at the same time (assuming its all stock) for $165 shipped. Shift points, more timing, efans, torque management, etc. Send me a PM or an email at atomicfandp@gmail.com if you are interested. Thanks
#3
TECH Addict
iTrader: (3)
If you absolutely don't want those features, a cheap fan controller with a 40A relay would be easiest. https://www.summitracing.com/parts/hda-3653/overview/
#6
I can take care of that for you and also do some basic tuning on it at the same time (assuming its all stock) for $165 shipped. Shift points, more timing, efans, torque management, etc. Send me a PM or an email at atomicfandp@gmail.com if you are interested. Thanks
If you're going to pay someone to alter the PCM, you may as well get the other benefits that Atomic mentioned.
If you absolutely don't want those features, a cheap fan controller with a 40A relay would be easiest. https://www.summitracing.com/parts/hda-3653/overview/
If you absolutely don't want those features, a cheap fan controller with a 40A relay would be easiest. https://www.summitracing.com/parts/hda-3653/overview/
Located in Shreveport, Louisiana.
#7
TECH Veteran
iTrader: (25)
I'll do it for just shipping cost. I think if you are just going to use the PCM to command low speed fans and the A/C clutch to command high speed fans then your 99 OS will work for that. I know that if you want to have the PCM command both low and high speed by reassigning the auto air recirculation pin to fan operation for the high speed you have to upgrade the OS in the PCM to at least a 01 OS. I'm in OKC OK. If you want to ship me the PCM and include $13 for return shipping USPS Priority Mail then send me a PM for my shipping address.
Last edited by 2xLS1; 02-08-2018 at 10:28 AM.
Trending Topics
#8
TECH Veteran
iTrader: (25)
Well after reading through this thread again I don't know if the 99 OS will even operate just the low speed fan correctly. It might require an OS update even for that.
https://forum.hptuners.com/showthrea...ersion-problem
https://forum.hptuners.com/showthrea...ersion-problem
The following users liked this post:
ScottyBoy (02-09-2018)
#9
After doing a lot of reading and Googling, it does indeed seem that the 99 computers are a complete clusterfuck. I think the best thing to do is just get a thermostat fan controller to get his fans wired up and working. If he decides to get a tune one day in the future, then I'll have him get a donor PCM off of a 2001 or later. The junkyards here charge about -$60 for them.
#10
Custm2500's Rude Friend
iTrader: (17)
After doing a lot of reading and Googling, it does indeed seem that the 99 computers are a complete clusterfuck. I think the best thing to do is just get a thermostat fan controller to get his fans wired up and working. If he decides to get a tune one day in the future, then I'll have him get a donor PCM off of a 2001 or later. The junkyards here charge about -$60 for them.
I use a 2002 operating system in a 99 computer. There is very little change between an 99-00 and the 01-02 PCM. This is how I get the fans to operate correctly in the early trucks.
https://www.performancetrucks.net/fo...h-info-536648/