Weird lighting problem after switching to LEDs - JeepForum.com
 
LinkBack Thread Tools
post #1 of 8 Old 10-23-2015, 05:22 PM Thread Starter
RockRodHooligan
Web Wheeler
 
RockRodHooligan's Avatar
1996 XJ Cherokee 
 
Join Date: Mar 2007
Location: Noblesville
Posts: 5,448
Weird lighting problem after switching to LEDs

I've recently switched all of my lighting over to LED(with the exception of headlights). I have the LED flasher relay so hyper flashing isn't the problem. My problem is when I hit my brakes(no lights on) the dash and front parking lights light up a little. With my parking/headlights on, the turn signal indicators on my dash light up, maybe 50% power, they flash dark and full power when I hit my turn signals/hazards. I also have "switch back" LEDs in the front, the way they are supposed to work is: they are white as a parking/marker light, hit the turn signal and they flash amber, then switch back to white when the turn signal turn off. They don't do that. Most of the time they stay amber, unless I just have my parking lights on, then they are white. But most of the time, once I switch my headlights or fog lights on, they switch to amber. Driving around at night, sometimes they do switch back to white, so I have one white, one amber, driving down the road, and eventually they seem to switch to amber. So, basically the switch back bulbs work the way they are supposed to about 50% of the time.

I've tried regular LED bulbs in the front, but the low/high function was very minimal, and almost not visible, at least with the switch back bulbs it flashes on/off.

Any suggestions as to fixes? I tried the load equalizers before, it just made the stock flasher buzz if I had the parking lights on.


96 XJ:Parking lot Pre-Runner

89 MJ: Project: Ground up - Sold
01 XJ: Project: Silverback - Totaled

Quote:
Originally Posted by Apex View Post
***** inches...
Good god man. Indyorv :rofl: d**k and fart jokes. :rofl:
RockRodHooligan is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 10-28-2015, 03:23 PM Thread Starter
RockRodHooligan
Web Wheeler
 
RockRodHooligan's Avatar
1996 XJ Cherokee 
 
Join Date: Mar 2007
Location: Noblesville
Posts: 5,448
I had assumed that there was a possibility that cheap eBay brake lights may be bleeding through to the rest of the system, so a couple days ago I bought a higher quality LED, I've since decided the rear is not the problem. The day after changing them over, when I switch the headlights on, the front turn signals don't flash at all, the side markers do, but not the turn signal. Someone suggested the in-line load equalizers, so I pulled the tail light wiring harnesses to wire in them in. With both harnesses pulled I checked the lights and it made no changes. So I swapped in a couple older regular amber led bulbs, still no change.

So now I'm left looking for where the wiring for the brake lights, and the parking lights intersect. I replaced the flasher and that didn't change anything, so I'm guessing brake light switch? Turn signal switch? Another relay?

96 XJ:Parking lot Pre-Runner

89 MJ: Project: Ground up - Sold
01 XJ: Project: Silverback - Totaled

Quote:
Originally Posted by Apex View Post
***** inches...
Good god man. Indyorv :rofl: d**k and fart jokes. :rofl:
RockRodHooligan is offline  
post #3 of 8 Old 10-28-2015, 04:38 PM
chris87xj
JF Admin
 
chris87xj's Avatar
1987 XJ Cherokee 
 
Join Date: Sep 2006
Location: 3rd rock from sun
Posts: 10,080
The brake and parking lights positive feeds shouldn't intersect. They do share a common ground and if it were bad, some back feed could occur.
A trailer wiring adapter could also introduce cross-feeding.

***Chris***

"You can set my jeep on fire and roll it down a hill,
But I still wouldn't trade it for a Coupe DeVille."


JeepForum.com/IndyORV@Redbird-SRA

COTY 2009

chris87xj is offline  
post #4 of 8 Old 10-28-2015, 05:31 PM
mschi772
Web Wheeler
 
mschi772's Avatar
1997 XJ Cherokee 
 
Join Date: Apr 2012
Location: Racine
Posts: 3,174
Bad ground is likely.

Build Thread -- http://www.jeepforum.com/forum/f177/whats-chrokeese-build-thread-2525690/
mschi772 is offline  
post #5 of 8 Old 10-29-2015, 07:03 AM Thread Starter
RockRodHooligan
Web Wheeler
 
RockRodHooligan's Avatar
1996 XJ Cherokee 
 
Join Date: Mar 2007
Location: Noblesville
Posts: 5,448
Quote:
Originally Posted by chris87xj View Post
The brake and parking lights positive feeds shouldn't intersect. They do share a common ground and if it were bad, some back feed could occur.
A trailer wiring adapter could also introduce cross-feeding.
Thanks Chris, that's the most helpful information I've been able to get yet. I just re-did and cleaned up the wiring to the rear lights, so the rear is good. I've been meaning to go back and clean up the wiring on the front clip, from when I intergraded the headlight harness upgrade, so it will give me a chance to re-check them.

96 XJ:Parking lot Pre-Runner

89 MJ: Project: Ground up - Sold
01 XJ: Project: Silverback - Totaled

Quote:
Originally Posted by Apex View Post
***** inches...
Good god man. Indyorv :rofl: d**k and fart jokes. :rofl:
RockRodHooligan is offline  
post #6 of 8 Old 10-29-2015, 03:14 PM
JWELK
Registered User
1999 XJ Cherokee 
 
Join Date: Apr 2011
Location: Ceiba
Posts: 910
First off, did everything work before you made the switch? When dash lights come on with the brake lights, it usually indicates a bad ground, usually in the taillights. The ground gets bad and the current finds the past of least resistance and lights the dash lights. (Short answer to a quite possibly very involved explanation). Sooooooooooooooooo if everything worked before the switch, you either manipulated something that didn't want to be manipulated or LED's are far more sensitive to voltage issues than incandescents and the problem is just now becoming apparent. At any rate the solution for either is the same. Start at the battery, remove the Black cable clean to shiny bright, then remove the Red cable and do the same. Next follow the Black cable and remove the connection to the frame, clean to shiny bright and reinstall. (You can get various sizes of SS star lock washers at the Orange store. If you install these at each connection they will outlive the Jeep). Now re-install the Red Cable and the Black Cable. Do it in this order, this eliminates the possibility of the wrench slipping when you connect the Red Cable with the resulting flash. While you're under the hood, look for a braided wire near the center of the firewall, remove each end, clean to shiny bright and re-install. Next go to the Tail lights and remove each one and clean the ground(s) you know the rest. This should have solved the problem. Next week end do the same to the Head light, and front and side marker lights.
Let us Know
Regards,

Jim W
JWELK is offline  
post #7 of 8 Old 11-20-2015, 07:12 PM Thread Starter
RockRodHooligan
Web Wheeler
 
RockRodHooligan's Avatar
1996 XJ Cherokee 
 
Join Date: Mar 2007
Location: Noblesville
Posts: 5,448
So I've went through the rear wiring, and all of the connections are solid, but I'm starting to question the brake lights themselves. Because I did the reverse lights in the hatch, and I'm using Wagoneer lenses, I moved the turn signal lights to the clear lense that was the reverse light, I added a second brake light bulb to take the place of the empty spot that was the turn signal. I had been running three brake lights, but I started having problems with one of the bulbs on each side, they would all light up with the running lights, but one of them wouldn't light up when I hit the brakes? So I clipped the third pigtail and shrugged it off.

Front turn signals still don't flash when the parking lights are on, but the flash-back LEDs are working the way they are supposed to? It stays white with the parking lights, and turns amber when I hit the turn signal(doesn't flash though), turn signal turns off, and it switches back to white. I didn't actually do anything to it, it just kinda started working since I've been back from Vegas. I don't know if it's connected to the flash-backs working all of a sudden, or if it's because I cleaned up the ground connection on the fender tonight, but the front turn signals do flash with the hazards now.

I'm guessing that the front turn signals, and the dash lights coming on when I hit the brakes aren't entirely connected. Maybe the turn signal switch is causing the problem in the front?
Attached Thumbnails
image.jpg  

96 XJ:Parking lot Pre-Runner

89 MJ: Project: Ground up - Sold
01 XJ: Project: Silverback - Totaled

Quote:
Originally Posted by Apex View Post
***** inches...
Good god man. Indyorv :rofl: d**k and fart jokes. :rofl:
RockRodHooligan is offline  
post #8 of 8 Old 03-03-2016, 09:31 PM Thread Starter
RockRodHooligan
Web Wheeler
 
RockRodHooligan's Avatar
1996 XJ Cherokee 
 
Join Date: Mar 2007
Location: Noblesville
Posts: 5,448
Update: After chasing this problem for what seems like forever, every think seems to be working properly, and it took buying an MJ with a busted tail light to do it.

This is exactly how it was left when I bought it, light sockets were broken, bare wires on each other and on the body, blown fuses all over the place.

I had an MJ tail light that the lense was screwed up, and decided to try and use the housing so I have some sort of lights, at least until I can find a fix for the bed side.
We had the Sylvania Zevo LED lights at work and I decided to grab a couple of them so I would actually have red lights and it would help keep cops off my butt. They seemed to be pretty bright, and actually have really good distinction between tail light and brake light, unlike the ones I was using in the XJ(tail light was really bright, so bright the brake light was only a little brighter), so I decided to pick up some brake and rear turn signal lights for the XJ(1157 Amber LEDs aren't kept in stock), everything seems to be working the way it should now. The switch-back lights up front work the way they are supposed to be, front turn signals flash like normal.
Moral of the story is, there really is a difference in LEDs you find on the Internet, and the name brand ones you find in stores, even if you are paying close to the same price for the top of the line Internet LEDs, the name brand ones are still a higher quality, because they have their name on it, and want to protect that name.

96 XJ:Parking lot Pre-Runner

89 MJ: Project: Ground up - Sold
01 XJ: Project: Silverback - Totaled

Quote:
Originally Posted by Apex View Post
***** inches...
Good god man. Indyorv :rofl: d**k and fart jokes. :rofl:
RockRodHooligan is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome