efan problem

[BOSS]

Hi,


I'm having trouble with the fans after installing the harness...I've gone over and over my install and can't seem to find my problem.

So what happens is the pass side fan comes on when the key is turn to run position..and thats it. Then the truck overheats after running a few minutes.

The driver side fan never comes on, and I suspect the pass side fan is only on a low setting. The pass side fan remains running for 5-8 seconds after I stop the truck.

I triple checked that blue pin 42 was in the correct blue plug,.

I tap'd the "AC tap wire" into the lime green wire on the loom running verticle alongside the alt bracket. The "AC tap wire" color does not match the dark green wire in the compressor plug...is that an issue?

Any ideas?

 

[Justin]

What you are encountering is the green A/C tap seeing power 100% of the time.

When the A/C tap is powered alone, you will have one fan on high.
When the PCM tap is grounded alone, you will have two fans on low.
When both taps are active, you will have both fans on high.

Sounds to me like the PCM tap is either not inserted properly or is in the wrong pin hole (hence only one fan is coming on). Did you remove the acryllic blue pin cover before pushing the pin through?

From what you're describing, the A/C tap is not matched up to the correct wire either. That single fan should kick on ONLY when the A/C compressor is active. Look for another very similar wire in the loom to tap into.

 

[BOSS]

Ok I think thats one problem, the green wire to the compressor is actually hunter green...i tap'd the same color from your harness as you suggested ealier, which was lime green loom and lime green harness.

I don't think i removed that blue acrylic cover, but I can see where my pin was pushed through, I actually did it twice because it wouldnt go 100% the length of the hole the first time..it was only sitting at 80% through and it wouldnt budge. I finally got it all the way through...im telln ya its #42 if my name is bobby LOL

B

 

[BOSS]

If you look on blizz's how-to, I removed that grey plastic cover which covered the back of the pins...is that what you're talking about? you cant push the pin into the plug without removing that.
b

 

[Justin]

If you look on blizz's how-to, I removed that grey plastick cover which covered the back of the pins...is that what you're talking about? you cant push the pin into the plug without removing that.
b

That has to be removed but so does the blue cover on the other side. The pin will not seat without the cover being removed. Check your hotmail account.

---------- Post added at 12:05 AM ---------- Previous post was at 12:04 AM ----------

Ok I think thats one problem, the green wire to the compressor is actually hunter green...i tap'd the same color from your harness as you suggested ealier, which was lime green loom and lime green harness.

I don't think i removed that blue acrylic cover, but I can see where my pin was pushed through, I actually did it twice because it wouldnt go 100% the length of the hole the first time..it was only sitting at 80% through and it wouldnt budge. I finally got it all the way through...im telln ya its #42 if my name is bobby LOL

B

It wouldn't be the first time that a wire wasn't quite the color it was supposed to be...

 

[BOSS]

Will do Justin, I'll check my mail in a bit... I'm a little dumbfounded as to why the blue cover needs to be removed because my pin pushed all the way through, and when I pulled it out it was still flush with the other pin lengths...thats an easy fix if that's the problem

B

 

[BOSS]

Thanks btw, see you in july...truck is a different entity altogether since last time you were here
B

 

[BOSS]

Ok I see the pics, thanks....glad to know they exist

So I did everything good (including punching through the yellow rubber pin cover with my needle pick tool) EXCEPT remove that blue acrylic cover. I will check that out tomorrow and rework the AC clutch wire.

Thanks again
B

 

[Justin]

Will do Justin, I'll check my mail in a bit... I'm a little dumbfounded as to why the blue cover needs to be removed because my pin pushed all the way through, and when I pulled it out it was still flush with the other pin lengths...thats an easy fix if that's the problem

B

I can almost guarantee that is the problem as the cover prevents the latching portion of the pin "tray" from allowing the pin to retreat. In the same token, it cannot move far enough for the pin to clear this latch and fully seat.

 

[My01yuk]

How beneficial are these E-fans.

 

[BOSS]

How beneficial are these E-fans.

I already noticed an increase in throttle response. Basically that engine driven fan puts a drag on the crank, because the crank is what spins it.

Not only that, but at engine idle, the crank-driven fan can't cool the vehicle OR the a/c as well because it can't spin as fast.

So those are benefits enough to me, plus I like having all that room in my engine bay freed up and the loud ass crank driven fan gone...mine was LOUD, Justin said it was the loudest he'd ever heard LOL

B

 

[Rivieraracing]

Hey boss, were the fans you bought OEM used ones or are they OEM fit new ones? Also, did you ever get the tranny cooler and fan yet, I'm about to order my fan!!

 

[onedeadpresident]

Dark green wire is hot when the key comes on. The light green is active when the ac is engaged. Made the same mistake. I only have one of mine working and my mine won't overheat using one. It was 98 here today. ???

 

[My01yuk]

Cool, how much are they and do you have to get two?

 

[BOSS]

Ok after getting the pics from Justin and rechecking:

AC Compressor wire

, it looks like my compressor wiring is definitely a different color green again. I'm going to pull the connector out of the compressor and tap right off that so this issue is gone.​

PCM #42 PIN

I pulled the blue acrylic cover to make sure the #42 blue pin gets installed correctly inside that acrylic adapter. I checked and checked, and checked again that when the acrylic cover gets put back on, the pin does not move either up or down ...same as others. I also made sure the pin that the #42 PIN plugs over is not bent and neither are any of the other pins.

Also, if I turn the AC off...no fans EVER come on but the truck does NOT overheat.
​

I'm convinced that one of two things is happening:
1) these radiators are really efficient
2) my #42 PIN is not active

Bobby

 

[BOSS]

Dark green wire is hot when the key comes on. The light green is active when the ac is engaged. Made the same mistake. I only have one of mine working and my mine won't overheat using one. It was 98 here today. ???

Ok so what's the deal with this harness? Aren't both fans supposed to come on individually for something, together for something, low for something and high for another?


B

 

[BOSS]

Also, the green wire is supposed to go to the AC clutch wire...so when the clutch comes on the fan comes on, correct?

B

 

[BOSS]

Ok so now I'm frustrated..this is getting really really old

B

 

[JennaBear]

Are your fans used? Did you bend any of the PINs?

---------- Post added at 11:51 PM ---------- Previous post was at 11:33 PM ----------

What you are encountering is the green A/C tap seeing power 100% of the time.

When the A/C tap is powered alone, you will have one fan on high.
When the PCM tap is grounded alone, you will have two fans on low.
When both taps are active, you will have both fans on high.

Sounds to me like the PCM tap is either not inserted properly or is in the wrong pin hole (hence only one fan is coming on). Did you remove the acryllic blue pin cover before pushing the pin through?

From what you're describing, the A/C tap is not matched up to the correct wire either. That single fan should kick on ONLY when the A/C compressor is active. Look for another very similar wire in the loom to tap into.

This is how it works...


A real easy way to test the fans, is to touch the green wire to power, and the blue to ground and that will turn both on high.

 

[BOSS]

Are your fans used? Did you bend any of the PINs?

Fans are brand new, and no bent pins anywhere.

This is how it works...

A real easy way to test the fans, is to touch the green wire to power, and the blue to ground and that will turn both on high.

I'm gunna give it a shot again tomorrow, I'm really frustrated..when I started it admittedly I knew nothing bout what I was doing as you can tell by my posts, but I believe I do understand now.

Thanks for your continued support.

B