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Originally Posted by ttkresurfacing
I'm getting ready to put dual electric fans in the H2, does anybody have a wiring diagram so that I can connect wiring correctly from truck.
It's a 2003 if that matters.
Thanks,
Tim
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Hello here are installation guide for GM dual fan that was given to me when I got mine, hope it helps...
Dual Electric Cooling Fans Installation.
1) Take off the top section of FAN shroud. Try to remember how the fan shroud comes off as the new shroud with the motors in it will go back on in a similar manor.
2) Remove the mechanical fan. Just use a large crescent and put it over the nut behind of the mechanical fan and give the crescent a real quick hard hit with a metal hammer and it will jump loose and then you can take it off. It is a reversed thread, I think I remember right.
3) Remove the bottom half of the FAN shroud as new fans will no longer be needing the shroud. The new shroud with electric fans built into the new shroud just bolt back up to the same place except there will be some holes marked on the new shroud and drilled to mount the new shroud.
4) Cut approximately 18" section out of 2 tranny metal lines looking from the front looking down at metal line in the bottom RH side of radiator.
5) Be sure to cut tranny lines even with radiator or back towards the fire wall but, in an area so that You will have room to clamp in the 2 rubber hoses that will slip onto the tranny lines that will allow you to move tranny line over enough to install electric fan with it's shroud unit. You need to cut enough extra rubber hose so that it has room to move and not blow the rubber hoses off.
6) Line up new fans at the bottom and hook them over the lip of the bottom of radiator support and just let the grips on the shroud rest itself on radiator lip just like the old fan shroud was resting on the bottom lip. Move the fans around till they look balanced on the radiator then mark the holes at the top where old shroud bolted to radiator. Mark holes through the attached thread hole in the radiator support.. Try to reach through and measure straight and level through to get mark to drill new holes in the electric shroud. Do it carefully as You get one chance to do it right or You start drilling other holes and abandoning the hole in the support that was intended to be the nut for Your old bolts and go through the new shroud with a rubber washer under the head of the bolts and a rubber washer between the radiator and the new shroud. This will keep vibration to a minimum and prevent the new shroud from being damaged when You tighten down the bolt. Be careful when You do tighten the bolts down.
7) Now You are ready to install wiring harness from Allen Nelson Performance as per the instructions He sends with the harness.
Thanks!