Auxillary Fan Override Switch Write-up *pics* - Page 5

Holder350 · 02-04-2010, 01:00 PM

You would need to rewire the led to get it to burn.

Or use a relay.

**csouers** · 02-04-2010, 06:07 PM

Quote:

Originally Posted by Holder350

You would need to rewire the led to get it to burn.

Or use a relay.

I got a lighted switch. Got it wired up to work but no dice on the led. Would I need to wire the led light into the ground or the signal wire? That way when the switch goes to on, it lights up?

Quote:

Originally Posted by BuckeyeXJ

I guarantee you have an extended idle switch. You just need to tap into the A12 wire in the pcm and use a switch to ground it. Bumps your idle to about 1050 or so.

I can't find any A12 in the FSM on the PCM. Not sure what it would be on a 92...

**csouers** · 02-04-2010, 07:50 PM

Turns out that the extended idle is not an available option on non-fleet, base or police xjs from 1992. Oh well. At least I got one more mod under my belt!

Holder350 · 02-05-2010, 07:29 AM

Quote:

Originally Posted by csouers

I got a lighted switch. Got it wired up to work but no dice on the led. Would I need to wire the led light into the ground or the signal wire? That way when the switch goes to on, it lights up?

You would need to reverse the polarity of the led.

Then hook power to ground and ground to power then acc to the spliced wire.

**csouers** · 02-05-2010, 05:36 PM

Quote:

Originally Posted by Holder350

You would need to reverse the polarity of the led.

Then hook power to ground and ground to power then acc to the spliced wire.

I assume reversing the polarity would require taking the switch apart? The spliced wire you mentioned is the one from the PCM right?

Ps. Please, the sake of eye sight, get rid of the red font in your signature. It is quite painful to read.

Holder350 · 02-05-2010, 07:10 PM

Yeah pulling the switch apart is the only option to reversing the polarity of the LED and most switches are not meant to be pulled apart.

And I will change the color of my sig font....

GunnerT23 · 02-05-2010, 07:55 PM

.... uuummm... sorry, just chiming in here.
you just dont reverse the polarity of a Light Emitting Diode because of the Diode part. (just for the people who arnt familiar with them, if you had the idea to use a led, ya probally knew that)

and yes, I pulled apart one of them switches on my 00 because it had a rough spot and wouldn't trigger, and that plastic is tight and will break very easily!!!!

Holder350 · 02-05-2010, 09:37 PM

If you are using a switch designed for positive trigger to work with negative trigger you will need the reverse the annode and cathode of the LED otherwise it will not light up

dvmeter · 02-07-2010, 08:24 AM

ok all the talk about running a lighted switch just confused me. Has anyone ran a lighted switch successfully? I dont understand why anything has to be reversed (the annode cathode thing) but that must be due to my own ignorance. And you all say most switches arent designed to be opened up and reversed? how do you even reverse something like that anyways?

Another question: what are you guys grounding the switch to? I see in the diagrams that you need the DB/PK wire going to the switch adn then a ground going out. Are you all just going to a conveinent spot on the chassis or is there a factory ground position nearby that you can just add to?

Holder350 · 02-07-2010, 09:36 AM

Switches that light up mostly use LEDs, and these switches are designed to be used with a positive 12v trigger, not a ground.

Now sure you could hook up a 12v source to the "ground" terminal of the switch, but then the LED would be reversed. (Powered thru the cathode, and grounded thru the anode)

Now, if you can find a switch that uses a regular incandescent type bulb there would be no need for the reversal of the bulb, and while I have seen them over the years, they are rare to find now I do believe.

USMC_XJ · 02-07-2010, 09:43 AM

Quote:

Originally Posted by csouers

I can't find any A12 in the FSM on the PCM. Not sure what it would be on a 92...

I don't even have the extended idle. Supposedly the function is there for the 92-96 XJ's, but I have only heard success of it from 97+ XJ's.

As for the LED, I am unsure. I hope you get this figured out. I ran mine this way simply because I was broke and already had the parts for it.

corndogduff · 02-07-2010, 02:52 PM

Quote:

Originally Posted by dvmeter

Another question: what are you guys grounding the switch to? I see in the diagrams that you need the DB/PK wire going to the switch adn then a ground going out. Are you all just going to a conveinent spot on the chassis or is there a factory ground position nearby that you can just add to?

I used the ground for the cigar lighter to ground mine...

dvmeter · 02-07-2010, 07:31 PM

Quote:

Originally Posted by Holder350

Now, if you can find a witch that uses a regular incandescent type bulb there would be no need for the reversal of the bulb, and while I have seen them over the years, they are rare to find now I do believe.

So you're saying a switch with a regular old incandescent bulb should work fine? Wiring it as instructed? I have already done some searches online and have found a few switches with those bulbs.

Thanks for the input on the placement of the ground McDuffers.

Holder350 · 02-07-2010, 10:30 PM

Yes an incandescent bulb works no matter which way the bulb is powered, a LED is much different.

Super6XJ · 02-07-2010, 11:01 PM

i wouldnt mind doing this for mine.. the Fan stays on All Time! :/
but i dont really want to mess with electrical , its already messed up .

ugh (damn mexicans Splice wires and Stick them where ever)