Aux Fan pin 99 s-10

[bartender_77]

That was the cool part. Chevy uses two inputs and three relays to run the two fans in series in low and in parallel in high. 3 amps in low and about 13 in high. I will see if I can post the LS1 wiring diagram here.

Couldn't post the diagram, but here are the links to the website. I had never read the entire thread, but now I see that there is some good discussion in there about tuning the PCM. It has answered some of my questions.

http://img230.imageshack.us/img230/3...ingfansbu6.gif

http://www.ls1tech.com/forums/conver...gram-here.html

Well that was really helpful, i have installed a few set of fans but i could never figure out how to do the 2 speed deal, thanks!

[gnnova]

I'm going to do this Fan mod to my 1998 Blaser. Does anyone know if I use the #42 pin also or is it a different one?

Ken

[thebeewantsboost]

in my 2000 s10 what i did was repinned the wire that goes to the air pump to the fan 1 pin, 42. ditched the air pump. the air pump already has a relay and a30 amp fuse on the passenger side fender well. remove the battery to get to it. i used that power source, fuse and relay and wired both my fans to it. that relay gets a 12v signal for the air pump. so you hafta make that pink signal wire a constant 12v, i just cut it, and slid it in with the fuse blade. and what was the constant ground you connect your fan 1 ground signal 2. ta daaaaaaa... theres no 2 speeds and no running one fan, but you can control the temp via the pcm, a/c, coolant temp, and even program it to run after its off.