Aux. Electric fan switch wiring?

[Dazz]

Anyone have a drawing of the wires for the Auxiliary Fan Manual Override switch?

I unsure on where to tap for the override switch on a 91' and newer XJ.

[Chad88xj]

Not sure what you've already bought for this project, but I thought I'd tell you what I did.

I went to the Autozone here in Austin and told the guys what I was planning on doing. And the guy there told me about this kit they had for $17 or so.

The kit included a temp gauge that hangs just right behind your radiator and goes up to a new thermostat that you just install on the frame right above the radiator with a couple of bolts.

Anyway, you basically let your rig heat up to 200 or so and then adjust the screw on this new thermostat to turn on your fan. From then on, that's when it comes on.

The kit also comes with the wires that you run through a hole in the firewall over to your fuse box to give your fan new power. I wanted a switch as well, so that's where I did it. I just put a switch right under the dash in the middle of the wire (along with a 20 amp inline fuse) and then put the wire into an empty slot in the fuse box (batt. I think) that had enough juice to run it.

The switch works great, but to be honest, the temp gauge works so well I don't ever touch the switch. That way I don't have to worry about accidently leaving it on.

Hope that helps some.

Chad

[DesertXJ]

Chad88xj,

Waht is it called or do you have a p/n? I hate my F***ING switch. I've forgottrn to turn it on a couple of times, but luckily got things before they got out of control.

[Chad88xj]

DesertXJ,


I don't know the name or the part number off hand, but I drive right by that Autozone on my way home from work, so I'll try to stop by and see if the guy is working that got if for me.

I do remember that he went into the back and brought it out to me and that it wasn't priced or anything, so you probably won't be able to look it up on the autozone website. Not that it's probably working anyway....


One thing that I forgot to say earlier: the fan definitely stays on for a few minutes after I stop when it's been running pretty hot. I just stood and waited around the first couple of times to make sure it didn't run too long before the new temp gauge kicked in.

Now I just walk away and don't think about it. Lots of people say, "Hey, you're fan's still running." I used to explain why. But now I just say, "Yeah, it does that" and keep walking. A lot easier.


Chad

[Dazz]

Do you have any pics of your setup?
I'll try to stop by AZ to ask one of the rep. if they can offer the same assistance.

Thanks for the reply Chad88xj!

[DesertXJ]

Thanks Chad

That would be much appreciated as the guys at this A.Z. are idiots sometimes....

[BILLXJ]

..Hi: Dazz
Will send you the diagram via the "back-chanell" (email) if you prefer.Cannot paste it here directly .Let me know at
wjones43@netzero.net

[Dazz]

Originally posted by BILLXJ
..Hi: Dazz
Will send you the diagram via the "back-chanell" (email) if you prefer.Cannot paste it here directly .Let me know at
wjones43@netzero.net

I don't have it yet, maybe somone from the board can offer us a wiring diagram for the Aux. Fan?

Once or if I get it I'll PM you.

[Runnin'OnEmpty]

Chad, does your thermostatic switch look something like this?
Thermo Switch
I'm looking for a switch to operate the fan on my open radiator conversion.

Thanks.
Don

[Rick95XJ]

Hey guys, I can get you that part number tonight.......I have to go to work.

[Runnin'OnEmpty]

Great! Any other info on it would be welcome too.
Thanks.
Don

[Chad88xj]

Dazz,

Sorry about not addressing the wiring diagram for the fan. I guess that was your orginal question, wasn't it?

I didn't drive my 88 to work today (I just bought a 92 that I generally drive now) so I couldn't go out and look at it. But I believe I just tapped into the white and black wires right there on the fan before the harness connector to the actual coolant temp. sensor. Just peeled away some of the plastic to reveal some wire, wrapped mine right in there and taped it all up. I'll try to drive my 88 up here to my advertising agency tomorrow. We've got a digital camera so I can take a few pictures in the garage and put them up here.

Also, I noticed from another thread that you just put in the GDI 3 core as well. Sounds like you're going down exactly the same path I did: OEM stat, 3-core rad, fan switch. Not sure which system (open or closed) that you have on your year, but mine was the one without the radiator cap. It finally took doing all those things plus putting in a new coolant reservoir because mine wasn't holding pressure. After that, I swear I couldn't get my rig to overheat if I tried. And, since you live in Texas as well, you know I've had plenty of opportunities. A/C on max, sitting in Austin traffic in the summer, I look down and the needle is sitting happy at 210. It's a beautiful thing.

Don --

That thermostat from Ebay is pretty much what I've got. The one you linked to certainly has a lot more bells and whistles, seeing that it is built for two fans and seems to have an automatic shut off of some sort. But mine works fine for what I needed.

I didn't have time after work yesterday to get that number. I'll try tonight.

Chad

[korda]

Originally posted by Dazz
Anyone have a drawing of the wires for the Auxiliary Fan Manual Override switch?

I unsure on where to tap for the override switch on a 91' and newer XJ.

I'd be interested in reading about how to do it on a '91 up too. I've seen plenty of articles about older XJs but I've never read an answer on how to do it to newer ones.

[Dazz]

Chad88xj,
Did you leave the coolant sensor connector off after tapping into the Aux fan wire? What voltage is for the power source and did you use a fuse?
Thanks for the help btw and pics would really help.

I've done the 3-core GDI radiator swap a few days back, along with a new fan clutch and it reduced the eng. temp tremendously (180 degrees driving temp.)
The only reason I'm wanting to make a manual override switch is when I'm wheeling at low speed, the temps does climb upwards of 210F with just the single fan running.
If your XJ is a 91" or newer with a radiator cap, then you should have a open cooling system.

[Chad88xj]

Dazz,

First off, I stopped by the AZ on the way home and got the part number: 226203 ADJ ELEC FN CONT 17.99

For some reason another number came with it: 267187. The guy I spoke with said to give you both. Don't know why...

Anyway, it's exactly the part I put on about a year ago on my 88. As you said, my 88 is on the closed system, so I just went out and compared it to my 92 with the open system so that I might be of more help.

All I did on the 88 was follow the kit directions and tap right into my white wire an inch or two from the aux fan. (It appears just as accessible on my 92). I just left the ground the way it was. I bolted the new temp gauge right there on the frame (basically right next to where the rad cap is on yours) and then ran the wires around with some nylon ties over to the firewall. Now, my 88 had a big hole in the firewall where some other wires ran through. My 92 doesn't. You might have to drill one.

Once inside the cab, the guy I talked to told me to just go into an empty slot in the fuse box. I just chose one, and it blew a fuse in a few seconds. So I chose another ("batt" which is in the same place on my 88 and my 92, and also empty on my 92) and it did just fine. I'm not sure of the voltage. I pretty much figured that if it worked, I wasn't going to ask any questions. I did install an inline 20 amp fuse which has never blown.

I'll try to get some pictures tomorrow, but I'm not sure I'll have time. I'll try. But I will say that I had never done anything like this before and I pretty much figured it out straight from the wiring diagram in the directions.

Oh, and i did go ahead and leave the normal coolant temp sensor plugged in. I figured it really couldn't hurt.

Good luck,

chad