Hey guys. The previous owner of my 87 iroc tpi, must have done some rigging on the fans (dual). The primary fan is running all the time, as soon as you turn the ignition on. The secondary fan doesn't come on at all. well it's been over heating while sitting in traffic. So I started digging into it and I found that the relay has been bypassed. I'd really like to return it to it's original state. But I can't find a wiring diagram of the relay. And I would like to know, at what temp are the fans supposed to kick on?



------------------
Mario,
White 94 Z28
Yeah I got a few mods
Video

 

I believe the stock fans are supposed to turn on at 220 and off at 200. Having one fan turn on when you start it is fine but you need to make the second turn on when you need it. I suggest you first find out if the other fan even works and if so hook it to a switch on or under your dash and when it gets warm turn on the second. Hope this helps