i finished my efan install yesterday
Id like to thank Fast4popper, Moze from ls1truck, sprayed99, Tony from collision revision, badass03ss, 616 of 933, Nelson performance, and anyone else I left out for your help and suppport.
I started with my St. Aubin's wire harness. and my painted set of 05 efans.
i needed a 3/8th socket, an 8 mm socket, a reg screw driver, a 7 mm socket, a 3/8 nut, various zip ties, some electrical tape, and a wire tap, and a few other wrenches
an oh, 1 c clamp.
I removed the battery.
I took off the air intake tube.
i put the c clamp on the belt and the water pump pulley to keep it from spinning. i put an adjustable wrench on the nut behind the fan, and tapped it with a hammer.
Voila.. came right off.
i removed the two bolts holding the fan shroud on, and took out the fan and the shroud.
i then carefully placed my new efans in place, careful not to scratch them cuz they were just painted.
Then I put the St. Aubin's harness in place. i started by removing the pcm using "mr p's " pcm removal instructions posted by Sprayed99. I put my lead in pin 42 of the BLUE connector. It took a bit of work to get it in there, but it finally went in all the way.
I put the pcm back together and remounted it, as i was done with it.
Next, moved to the wire loom next to the plastic battery box , which is next to the alternator. I am talking about the loom to the LEFT of this box.
You can see it here, behind the box, with a lump in it covered with electrical tape. (more about why the box has tape on it later....
In that loom, I tapped into the GREEN wire using a wire tap I had for 18g wire. this is the AC turn on lead.
I then turned to the fan wires themselves. I put flat blade connectors on them until my GM connectors show up next week. I put them on the fans, not sure of which is pos, and which is neg until i test them.
I bundled the relayed and extra loom infront of the washer bottle and secured them with zip ties away from the radiator for now until i find a neater way to secure it all.
Then, the most important and trying part.. POWER....
next to the alt, where that red plastic box is, there is a bracket. I used a bolt from there to ground the harness. I used an "eyelet' connector I got with my St. Aubin harness. The last connection was power. my last 'eyelet' connector wouldnt fit under the battery terminal, so i had to look at putting it inside that red plastic box.
However, that 3/8th inch bolt would not come out. i actually broke the lid off that box, which is why its taped, and cracked the box. I am going to look to buy a new one soon. What i did do was go get another 3/8th inch nut, and put the connector over the bolt, and then put the new nut over it and tighten it down.
This worked perfectly. I just had to alter the box cover slightly to accomodate the additional cable.
I put some tape over it to hold the cover on it for now.
and there we have it.. efans.. I started the truck and turned on the air, but hitting the snow flake button, so this appeared:
and the fans did NOT come on.
I turned it off:
and they DID come on.. I dont know whats up with that.. but ive noticed that snowflake never gave me AC in the past,.. maybe my controls are goofy.
i noticed the passenger side came on with the AC on, so I waited for the engine to come to temp.. and both fans came on.. but they were blowing the wrong way.
i turned the truck off. I went to each fan and reversed the pos and neg. Started the truck up, and the fans blew the right way.
At idle, the AC blew much better. I havent tested the mpg or additional HP yet.. ill report those back this week..
additional pics.. i need to upgrade my alt, and im disappointed it didnt help the tranny cooler
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Originally Posted by JBW
