Superbright LED question - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-05-2013, 08:42 AM   #1
Jeeper
 
beaureed445's Avatar
 
Join Date: Sep 2012
Location: Oklahoma
Posts: 476
Superbright LED question

I upgraded all of my interior lights to superbright LEDs, and I've got an issue. My speaker pod lights aren't going all the way off. Please see attached pics. What could it be? The 1st pic is "off" and the second is "on."

__________________
'03 TJ/ 4" Currie Lift/ Bilstein 5100's/ 35x12.50 BFG KM2's/ G2 Dana 44's/ 4.56 gears/ Eaton Lockers/ Anti-Rock/ CurrectLync/ MetalCloak Track Bars
beaureed445 is offline   Quote Quick Reply
Old 11-05-2013, 11:26 AM   #2
Jeeper
 
beaureed445's Avatar
 
Join Date: Sep 2012
Location: Oklahoma
Posts: 476
Bump.....No one?

__________________
'03 TJ/ 4" Currie Lift/ Bilstein 5100's/ 35x12.50 BFG KM2's/ G2 Dana 44's/ 4.56 gears/ Eaton Lockers/ Anti-Rock/ CurrectLync/ MetalCloak Track Bars
beaureed445 is offline   Quote Quick Reply
Old 11-05-2013, 11:34 AM   #3
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,629
I don't know exactly how it works on the newer models, but I'm guessing your just dimming them and not actually timing them off.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote Quick Reply
Old 11-05-2013, 11:34 AM   #4
ExtremeTerrain.com Sponsoring Vendor
 
XTRyan's Avatar
 
Join Date: Dec 2012
Location: Malvern, PA
Posts: 3,163
There is probably a normal amount of currently leakage through this circuit. It's not enough to light up an incandescent bulb, but being that the LED draws/requires so little current to light, you see it glow. You could most likely put a resistor of some kind in the circuit to fix your problem, but I'll let someone with more experience of that type chime in.
__________________
Ryan H. | ExtremeTerrain.com Off-Road Outfitters
Toll Free: 800-988-4605 | Mon-Fri 10AM-6PM EST
Free Shipping on Orders Over $75!
EARN UP TO $200 TOWARD YOUR NEXT PURCHASE!
PM me for our WranglerForum Discount Code (must have 25 posts) or Price-Matching!
GET YOUR FREE JEEP PARTS CATALOG!
XTRyan is online now   Quote Quick Reply
Old 11-05-2013, 01:57 PM   #5
Jeeper
 
Join Date: Mar 2012
Posts: 24
They sell canbus specific leds, I used them in my 01 and have no issues. I have the earlier sound pod so I don't know what bulb size yours is or if they sell a canbus one to replace it. If not, the resistor method would be the way to go.
sweetbmxrider is offline   Quote Quick Reply
Old 11-05-2013, 07:50 PM   #6
Jeeper
 
Join Date: Feb 2013
Location: Salt Lake, UT
Posts: 110
Quote:
Originally Posted by freeskier View Post
I don't know exactly how it works on the newer models, but I'm guessing your just dimming them and not actually timing them off.
LED's will not dim unless there is another form of resistance (an incandescent light or resistor) inline with them. They are effectively On or Off.
Qurtyslyn is offline   Quote Quick Reply
Old 11-05-2013, 08:16 PM   #7
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,629
Quote:
Originally Posted by Qurtyslyn View Post
LED's will not dim unless there is another form of resistance (an incandescent light or resistor) inline with them. They are effectively On or Off.
That's not at all true. There are two ways you can dim lights and that's through added resistance or Pulse Width Modulation (PWM). Both methods work for both types of lights, it's just that with LEDs it takes a LARGE change in resistance to see a difference in brightness. Compared to incandescent where a very small change resistance is needed. PWM is better because it works the same for either type.

It is my understanding the newer TJs use PWM. Based on this thread it also sounds like there's no "hard off" and it's just turning the duty cycle down to 0, but there's some voltage leakage. Not noticeable with the relatively large resistance of an incandescent but noticeable with an LED.

The older TJs do not have this problem because 1) dimming doesn't really work with LEDs in the first place since it's resistive based and 2) it is a "hard off" switch.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote Quick Reply
Old 11-05-2013, 09:45 PM   #8
▄▌ee▐▀

WF Supporting Member
 
Hardermods's Avatar
 
Join Date: Jul 2009
Location: Kansas
Posts: 1,384
Which leds off superbright did you use?
Hardermods is offline   Quote Quick Reply
Old 11-05-2013, 10:26 PM   #9
Jeeper
 
beaureed445's Avatar
 
Join Date: Sep 2012
Location: Oklahoma
Posts: 476
Ok, so here's what I found. This "issue" didn't start until today, when I swapped out the incandescent courtesy lights to LED. I swapped one of them back to incandescent, and the issue went away. Which leads me to believe that it is a lack of resistance.
__________________
'03 TJ/ 4" Currie Lift/ Bilstein 5100's/ 35x12.50 BFG KM2's/ G2 Dana 44's/ 4.56 gears/ Eaton Lockers/ Anti-Rock/ CurrectLync/ MetalCloak Track Bars
beaureed445 is offline   Quote Quick Reply
Old 11-06-2013, 08:54 AM   #10
Jeeper
 
Join Date: Mar 2012
Posts: 24
The canbus leds I used in my 01 still dim. They aren't like stock but I would say they dim to about half power then turn off. I actually used one of their led dome lights as well in my hardtop, not canbus specific, and it works just like the others.

sweetbmxrider is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 09:36 AM.



Jeepģ, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC