Aftermarket electrical systems Aftermarket electronics only! stereo head units, CD players, MP3 players, speaker systems, amplifiers, hardmounted GPS devices, computers, headlight upgrades, fog lights, off-road lights, general wiring and anti-theft devices.

Reducing light output of led switch

Old 08-30-2016, 06:17 PM
  #1  
Senior Member
Thread Starter
 
Join Date: May 2014
Location: Iroquois Ontario Canada
Posts: 946
Year: 1998
Model: Cherokee
Engine: 4.0
Question Reducing light output of led switch

I recently added a LED light bar and some LED flood lights to my XJ. They work fine but the switches I got for them are ungodly bright, and I mean so bright they blind you once the sun goes down. Even in day light they are some what of a distraction if you turn them on, not that you would need auxiliary lighting during the day.

Would I be able to reduce the light output of the switches by adding a resistor to the power side of the switch and still be able to activate the relays for the auxiliary lights? Also what size resistor would you suggest?
SG Mason is offline  
Old 08-30-2016, 11:48 PM
  #2  
Senior Member
 
cliffy's Avatar
 
Join Date: Sep 2014
Location: A.A. Co. Maryland
Posts: 736
Year: 1995
Model: Cherokee
Engine: 4.0 Inline
Default

A rheostat is an adjustable resistor but I don't know for sure what wattage you would need. Just guessing but this is 12v with _____Amp fuse? If it is a 20a fuse in circuit it would need to be 240w but if it can be found it would allow for the lights to be on a dimmer effect. The higher the wattage on the switch the better the heat dissipation. I would also put it in series with feed to the lights not the relay. If you lower the power going to the relay it may not be enough to energize the coil and they won't pick.
cliffy is offline  
Old 08-31-2016, 03:28 AM
  #3  
Senior Member
Thread Starter
 
Join Date: May 2014
Location: Iroquois Ontario Canada
Posts: 946
Year: 1998
Model: Cherokee
Engine: 4.0
Default

Originally Posted by cliffy View Post
A rheostat is an adjustable resistor but I don't know for sure what wattage you would need. Just guessing but this is 12v with _____Amp fuse? If it is a 20a fuse in circuit it would need to be 240w but if it can be found it would allow for the lights to be on a dimmer effect. The higher the wattage on the switch the better the heat dissipation. I would also put it in series with feed to the lights not the relay. If you lower the power going to the relay it may not be enough to energize the coil and they won't pick.
I don't want to lower the output of the auxiliary lights, I want to lower the output of the little LED in the switch. That little blue LED is super bright on both switches. to give an idea of how bright they are yo can see the glow of the LED built into the switch in my light bar test video at 0:22.


That is just the glow from it, the switch is never actually in frame.
SG Mason is offline  
Old 08-31-2016, 05:54 AM
  #4  
Beach Bum
 
SteveMongr's Avatar
 
Join Date: Jul 2011
Location: Cape Hatteras, North Carolina
Posts: 6,110
Year: 2000 WJ
Model: Grand Cherokee
Engine: 4.0
Default

black permanent marker
SteveMongr is offline  
Old 08-31-2016, 07:40 AM
  #5  
TIME TO GET SCHWIFTY
 
roninofako's Avatar
 
Join Date: Feb 2011
Location: Apple Valley, CA
Posts: 13,072
Year: 97
Model: Cherokee
Engine: 4.6 stroker
Default

Different switch.

I have some of those blue LED toggles in my jeep, the PO installed them for what I'm going to guess was aux lighting...I re-used them, and you're right. They are ungodly bright. So much so, that I disconnected them. Blue might be a good spectrum for indirect light, but not for shining in your face.

I would get a different switch.
roninofako is offline  
Old 08-31-2016, 07:07 PM
  #6  
CF Veteran
 
Join Date: May 2012
Location: Lost in the wilds of Virginia
Posts: 4,521
Year: 1998 Classic (I'll get it running soon....) and 96 (just purchased) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Default

Originally Posted by roninofako View Post
I would get a different switch.

Agreed.

And by the way, blue is the worst possible color for retaining night vision. Look up "visual purple" to learn why.

Red is best.
BlueRidgeMark is offline  
Old 08-31-2016, 08:43 PM
  #7  
Senior Member
 
Join Date: Feb 2011
Location: orrville ohio
Posts: 822
Year: 1994
Model: Cherokee
Engine: 4.0
Default

use finger nail polish over it
tinytrax78 is offline  
Old 08-31-2016, 11:32 PM
  #8  
Senior Member
 
cliffy's Avatar
 
Join Date: Sep 2014
Location: A.A. Co. Maryland
Posts: 736
Year: 1995
Model: Cherokee
Engine: 4.0 Inline
Default

Yes a resistor could help knock those down in brightness too, one of the other suggestions would probably be easier though.
cliffy is offline  
Old 09-02-2016, 08:02 PM
  #9  
Senior Member
Thread Starter
 
Join Date: May 2014
Location: Iroquois Ontario Canada
Posts: 946
Year: 1998
Model: Cherokee
Engine: 4.0
Default

I paid too much just to scrap the switches and replace them with something else. I tried dulling them down with a sharpie and the lens on the switch is too smooth so the ink just rolled off. I don't have any nail polish that is semi transparent. Yes I have some black nail polish, but I don't use it on myself. I use it when I etch my makers mark on the knives I make with pattern welded steel. Unfortunately it has been a long time since I made a damascus steel knife so the black nail polish has dried out.

I do how ever have the old transmission computer from my Stealth and am able to source 4 680 ohm and 4 1k ohm resistors out of it and the power leads to the switches are accessible by just pulling the center pod out of the dash. I can just snip the wire and add in resistors till I get the switches dulled down enough to be acceptable and still trigger the relays.

If that fails I will break out the needle files, they are packed away for tomorrows move, and file down the lens on the switches, but that means I will have to disconnect them so I can get to the lenses without any obstructions from the dash and steering wheel.
SG Mason is offline  
Old 09-02-2016, 08:23 PM
  #10  
CF Veteran
 
Join Date: May 2012
Location: Lost in the wilds of Virginia
Posts: 4,521
Year: 1998 Classic (I'll get it running soon....) and 96 (just purchased) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Default

Originally Posted by SG Mason View Post
I can just snip the wire and add in resistors till I get the switches dulled down enough to be acceptable and still trigger the relays.

Most automotive relays only need about a quarter amp to trigger, so you may have success with that route.

Do these switches have just two terminals?
BlueRidgeMark is offline  
Old 09-02-2016, 08:32 PM
  #11  
Senior Member
Thread Starter
 
Join Date: May 2014
Location: Iroquois Ontario Canada
Posts: 946
Year: 1998
Model: Cherokee
Engine: 4.0
Default

Three terminals, they are the Grote 82-2136 LED rocker switches, like this, but with a blue LED and clear lens



The blend into the dash nicely except when they are on, then the LED is super bright. I will go out and take a picture of them lit up and you will see the glare problem I have with them.
SG Mason is offline  
Old 09-02-2016, 08:48 PM
  #12  
Senior Member
Thread Starter
 
Join Date: May 2014
Location: Iroquois Ontario Canada
Posts: 946
Year: 1998
Model: Cherokee
Engine: 4.0
Default

Switches off, picture with flash.

Name:  20160902_213450_zps3cgtnena.jpg
Views: 7
Size:  216.0 KB

On with no flash

Name:  20160902_213414_zpsbb4kbor0.jpg
Views: 7
Size:  64.2 KB
SG Mason is offline  
Old 09-03-2016, 03:04 AM
  #13  
Senior Member
 
Join Date: Jun 2016
Location: Santa Clarita California
Posts: 774
Year: 2001
Model: Cherokee
Engine: 4.0L
Default

Try putting the resistor on the ground to the switch . the ground is for the LED light in the switch only and if you add a relay you can change the brightness of the switch so it can be dimmer when the headlights or on .
tech is offline  
Old 09-03-2016, 03:24 AM
  #14  
CF Veteran
 
Hommersimpson's Avatar
 
Join Date: Jan 2010
Location: St Augustine Florida
Posts: 1,087
Year: 1992
Model: Cherokee
Engine: 4.0
Default

Originally Posted by cliffy View Post
Yes a resistor could help knock those down in brightness too, one of the other suggestions would probably be easier though.
Yep what I was thinking too .. just use a 10 ohm ruffly to the ground going to switch that is used to ground the led.. should be simple enough.. find some old junk electronic thing like vcr or old tv anything .. cut a few out and keep trying till ya hit the right one..
Hommersimpson is offline  
Old 09-03-2016, 07:46 AM
  #15  
Senior Member
Thread Starter
 
Join Date: May 2014
Location: Iroquois Ontario Canada
Posts: 946
Year: 1998
Model: Cherokee
Engine: 4.0
Default

In day light testing I could not tell if the resistors I have on hand 680 and 1K are doing much, but I did stumble onto a simpler solution, just disconnect the grounds and go without the indicator lights Mind you I like the idea of having something to let me know if I accidentally turn on the lights during the day.

I am going to go though the old TCM for the Stealth and see if there are any other resistors that may be more suitable for the job.
SG Mason is offline  

Thread Tools
Search this Thread
Quick Reply: Reducing light output of led switch


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: