Auxillary Fan Override Switch Write-up *pics* - Page 7

Apostle · 03-04-2010, 05:32 PM

just pulled a switch that im using. opened it up and reset the led so earth would actually be the positive end. put the little resistor it had in line with it and tried it. didnt work.

think i am going to get a NO relay and try it that way. just need to find the right one

Apostle · 03-05-2010, 12:17 PM

Set up my LED switch to send power to a relay.

On relay - have the b/p wire going to pin 85, ground going to 86. ground going to 87 and hot going to 30

LED lights up, fan comes on, no CEL

**dagr8tim** · 03-05-2010, 12:46 PM

Awesome info. I dunno how I missed this thread in the past.

gmelton2 · 03-12-2010, 03:32 PM

I just did this mod on my 96 and it sets the CEL. So....If someone could elaborate on the relay setup that Apostle described a couple post up, I would appreciate it. One thing I don't understand for his configuration, do you cut the db/pk wire or just tap into it. If you cut it, what terminals on the relay do the now 2 db/pk wires go to on the relay?

Any help would be appreciated.

Greg

Holder350 · 03-12-2010, 07:25 PM

First off I apologize to Buckeye for stealing his diagram for a start

Here is Apostle's diagram.

This should be no different that a switch.

THIS should cure the CEL

Apostle · 03-12-2010, 08:18 PM

yeah, didnt cut mine. cut off about 1/2" of the wire cover, then wrapped the new and soldiered it.

gmelton2 · 03-12-2010, 08:41 PM

Thanks guys. I will try one of these tomorrow.

Greg

gmelton2 · 03-12-2010, 09:37 PM

Could it be done this way also to include a 3-way switch so that the fan can be turned off?

urnez12 · 03-13-2010, 06:27 AM

thanks for the info

Holder350 · 03-13-2010, 07:34 AM

Quote:

Originally Posted by gmelton2

Could it be done this way also to include a 3-way switch so that the fan can be turned off?

yes, would involve a bit more wire running, but is very doable.

That would be a good setup for water crossings, however if I have to cross water I shut the jeep off and let it cool a while, and usually wade the crossing to make sure I wont be surprised. Then I remove the fan relays and head across.

gmelton2 · 03-13-2010, 10:34 AM

Holder350,

I agree about crossing the creek on foot to avoid surprises. Now you got me thinking on pulling the fuses/relay. That may be a better option. Kind of hard to forget and leave it off that way.

Greg

Holder350 · 03-13-2010, 11:27 AM

Yep I am a forgetful bastard and I hate having anything that I can forget to leave on or off.

**dagr8tim** · 03-13-2010, 05:53 PM

Can somebody tell me if I labeled the relay properly in this diagram? I'm lazy and more used to dealing with the number on a relay.

gmelton2 · 03-13-2010, 06:36 PM

If you will give me a minute I will go out to my shop and get my sketch because I just completed this and I marked up my sketch just as you have but it is in my shop. Be back in a minute.

Greg

gmelton2 · 03-13-2010, 06:52 PM

Here is how I did it. Another thing that is most likely different is if you have a three position switch, most of them will have the center position off instead of one of the end positions as I have indicated.