How To : Aux cooling fan/ condenser fan install with pics!

[Rocket Man]

im glad it worked for you my friend, will be waiting for your update on how it works.
could you check your power voltage how is it when its on.

im still searching for the - Harness to do mine, i couldnt find it in my local parts store and the delivery it takes up to a month, i might search on a used parts store.

eBay has a couple NOS.

 

[George Cobos]

Hi there first of all great thread i did this to my 01 tahoe yesterday since i live in south texas and we are having 100 plus temps latley. i followed everything you put to the T. Only thing is i had to reverse the wires on the efan because when i installed it was pulling instead of pushing so when i reversed it pushed correctly in sync with the radiator clutch fan. temp stays steady at 210 or below and ac very cold now. thank you for thread again.

 

[George Cobos]

I

im glad it worked for you my friend, will be waiting for your update on how it works.
could you check your power voltage how is it when its on.

im still searching for the - Harness to do mine, i couldnt find it in my local parts store and the delivery it takes up to a month, i might search on a used parts store.

I found the harness at group1autoparts.com it was approximately $30

 

[Caleb Sayles]

I've got a 2001 suburban 1500 I tried to perform this mod on I however just ran a wire straight to the fuse block connection and a ground to the body from the fan it worked fine for a few minutes and then the motor on the fan locked up but no wires or fuses got hot or blew so I'm curious if that's all the relay is for is to prevent this incident or if I have another issue

 

[Rocket Man]

I've got a 2001 suburban 1500 I tried to perform this mod on I however just ran a wire straight to the fuse block connection and a ground to the body from the fan it worked fine for a few minutes and then the motor on the fan locked up but no wires or fuses got hot or blew so I'm curious if that's all the relay is for is to prevent this incident or if I have another issue

The relay is there so you can use it to trigger the main power to the fans since these can pull 40-50 amps. To use just a switch for that kind of power you would need a huge switch. The relay can be triggered by a small wire with a small fuse on it with the main power to the relay having a much bigger wire and fuses. You might have melted the inside of the wire so it doesn’t pass current anymore. Is the fan locked up or does it spin freely?

 

[Caleb Sayles]

The relay is there so you can use it to trigger the main power to the fans since these can pull 40-50 amps. To use just a switch for that kind of power you would need a huge switch. The relay can be triggered by a small wire with a small fuse on it with the main power to the relay having a much bigger wire and fuses. You might have melted the inside of the wire so it doesn’t pass current anymore. Is the fan locked up or does it spin freely?

The fan has locked up completely

 

[Rocket Man]

The fan has locked up completely

Bad fan then

 

[Caleb Sayles]

I found a relay in my extra electrical contractor will this work and if so which wires would go to where

 

[Caleb Sayles]

I found a relay in my extra electrical contractor will this work and if so which wires would go to whereView attachment 254150 View attachment 254150

 

[TheAutumnWind]

I found a relay in my extra electrical contractor will this work and if so which wires would go to whereView attachment 254150 View attachment 254150

Huh?

 

[ztreat]

I just wanted to say "thank you very much for this post"! I followed your steps word for word. The fan worked flawlessly so far. I live in Texas and it is brutal heat right now. My family thanks you too!

 

[Tonyrodz]

I just wanted to say "thank you very much for this post"! I followed your steps word for word. The fan worked flawlessly so far. I live in Texas and it is brutal heat right now. My family thanks you too!

Where did you find that harness? Link?

 

[Rocket Man]

Where did you find that harness? Link?

Post #2 has the p/n’s and Amazon or EBay has the fans. They don’t show a harness included but it must be.
AcDelco 15-8686

 

[Tonyrodz]

Post #2 has the p/n’s and Amazon or EBay has the fans. They don’t show a harness included but it must be.
AcDelco 15-8686

I did Google those, but it was showing different harnesses for that same part number. I figured I'd ask since he already did it. Just as a confirmation.

 

[Rocket Man]

I did Google those, but it was showing different harnesses for that same part number. I figured I'd ask since he already did it. Just as a confirmation.

I just noticed the harness is separate. The GM number looks legit, not sure about the other aftermarket ones.
GM 88880045.

 

[ztreat]

Where did you find that harness? Link?

I found all of it on e-bay. They are fairly old nowadays. So, it was nice to find a brand new harness. I would just keep hunting on e-bay. The numbers are changed sometimes. You can cross reference the numbers on AC Delco's website.

 

[Spaul]

Don't mean to bump up an thread. Want to make sure the trigger wire would be the same for a 2001 Tahoe with rear AC?

 

[Krisma]

In case anyone still reads this, question:

The dark green wire that gets tapped into, is this the same dark green wire that comes off "a/c compressor clutch relay" according to the schematic? Just want to make sure it's not the dark green/white wire that also goes to the "a/c compressor clutch relay"

My reason for asking is that I want to do this mod on a 2003 Chevy Express van first and want to make sure I am using the equivalent wire.

Also has there been any power issues with anyone running the a/c compressor clutch while tapped into the new harness relay? I'm leaning towards no since the fan motor gets power from the red wire mounted the fuse block and the purple to dark green wire is just a signal wire for the relay. Can someone confirm?

 

[joe-momma]

Don't mean to bump up an thread. Want to make sure the trigger wire would be the same for a 2001 Tahoe with rear AC?

Yes. Worked on 2002 tahoe with rear AC

 

[menusk]

Thank you for this post. This is a hidden gem. Worked perfectly, I got it done in 30 minutes