How to hook up Electric Fans to the Air Conditioner (AC) Clutch (Video)

Access to AC wire is easy with wheel and wheel well off

Access to AC wire is easy with wheel and wheel well off

This is part 3 (of 3) of my video series on installing a Griffin Radiator and Spal Electric Fans.  At this point, the radiator is in the car, and the required electronics are hooked up.  This means that the fans operate on a thermostatic control we earlier placed in the radiator.  At this point the fans will only come on when the temp is above 185 degrees.

In addition to this functionality, I also want the fans to come on when the air conditioner is on.  That is what part 3 is about.

From our grey wire, we need to also tap into the green wire by the AC

3rd Relay joins grey wire with AC clutch wire and 2 grounds

3rd Relay joins grey wire with AC clutch wire and 2 grounds

compressor via a 3rd (store bought) relay.  This way, even if the thermostat is not hot enough for the fans to come on, the AC clutch will override this and turn the fans on.  This relay will have 2 wires going to ground, our grey wire, and an additional wire going from the relay to the green wire by the AC compressor.

The installation is not hard, you just should be careful when clipping the wire over by the AC compressor and “tap in” the new wire so it sends the “on” signal to the relay, and therefore, the fans. This part is made much simpler if you jack up the front of the car, place it on jack stands, take off the front passenger wheel and plastic wheel well.

Green wire of the AC Compressor

Green wire of the AC Compressor

I pulled away some of the black sheath covering the green wire, and used a Philips head screw driver to get the wire free from an attach point on the AC compressor.  This gave me more room to snip and tap the wire.

 

 

After everything was connected, I spent some time running tests, and all was perfect!

Green wire "tapped" by yellow wire going to relay #3

Green wire “tapped” by yellow wire going to relay #3

 

 

 

 

 

 

 

So, check out the video, and be sure to check out my other videos, subscribe to my YouTube channel, and like and comment.   Thanks!
 

 
 

Installing AC Compressor – Rebuild Video 7

GM Truck LS Vortec AC Compressor

GM Truck LS Vortec AC Compressor

The AC compressor is heavy and awkward so you might be inclined to do the easiest bolts first which are the 3 on top.  That’s how I started.  But then I didn’t have enough wiggle room to get the 2 lower bolts in.

I started over with the hardest one, which was the front bottom one.  These bolts are LONG and they are hard to get in there because of a big piece of steering/suspension (I’m still not sure) equipment.  The only way I could get the front one bolted up was by hanging a ratcheting wrench on the bolt, inserting it, and then torquing it down.  Then I could get the wrench out.  If you find another way, please feel free to comment as I am sure it will be helpful.

Hang a ratcheting wrench on the bolt prior to placing it in the hole

Hang a ratcheting wrench on the bolt prior to placing it in the hole

So, check out the video, and be sure to check out my other videos, subscribe to my YouTube channel, and like and comment.   Thanks!

 

 

________________________________________________________________________

AC Compressor Removal GM Chevy Tahoe Vortec LS Engine vid 12

There are 5 bolts holding the AC Compressor on the GM 5.3 Vortec LS Engine, 3 on top and 2 on the bottom

There are 5 bolts holding the AC Compressor on the GM 5.3 Vortec LS Engine, 3 on top and 2 on the bottom

Here are the 5 bolts to the AC Accumulator on the GM 5.3 Vortec LS Engine.

Here are the 5 bolts to the AC Accumulator on the GM 5.3 Vortec LS Engine.

One of several electrical connections to the AC Accumulator on the GM 5.3 Vortec LS Engine

One of several electrical connections to the AC Accumulator on the GM 5.3 Vortec LS Engine

AC compressor removal was straight forward for me once I figured out where all the fastening bolts were.  I watched video after video and they glossed right over where the bottom bolts were.  I figured this was just one of those things that was so obvious, I should have known it going in.  But I didn’t know it, so I took care to make it obvious to anyone in my video.

The trick with the AC compressor (as with the power steering pump) is to keep the system closed, unbolt it from the block and just set it aside.  Not too much more to it than that.

So, check out the video, and be sure to check out my other videos, subscribe to my YouTube channel, and like and comment.   Thanks!