Trailer wiring gremlins... - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-10-2012, 04:13 PM   #1
Jeeper
 
jetskier111's Avatar
 
Join Date: Feb 2012
Location: Athens, Ga
Posts: 210
Images: 3
Trailer wiring gremlins...

Hey all,

I have a 2004 TJ but figured I would post this here to get more opinions.

I hooked up the trailer I have (new wiring on it with no issues) to my TJ. It had a wiring harness already but it looked old.

BEFORE I hooked it up, all electric items worked fine.

After hooking it up we had gremilns appear

what its doing now:
-when I hit the brake pedal the lights (in and out) turn on (funny but annoying)
-the right turn signal turns on a form of the hazards (right signal is brighter then the left but both flash)
-when headlights are on the right signal doesn't work
-left signal is fine.

I guess that hooking up the trailer, ie using the sketch harness, made some sort of short. The ground looks good.

I was thinking about just pulling the whole harness that is spliced in but figured I would ask for some advice before hand...

Thanks!

__________________
The way to end a frustrating day in grad school? Find a trail and get lost in it.
jetskier111 is offline   Quote Quick Reply
Old 09-10-2012, 08:03 PM   #2
Jeeper
 
Join Date: Nov 2011
Posts: 717
check the ground

Typically, when I have had weird gremlins in the trailer lights it has been the ground.

When it is hooked up, take a set of battery jumper cables and connect both to ground on the vehicle and the other end to the metal on the trailer. See if the lights work properly then.

ballistx is offline   Quote Quick Reply
Old 09-11-2012, 08:48 AM   #3
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,908
if that does not work and you know for sure that the trailer wiring is good then wire in a new pigtail on the jeep that you know is correct and yes make sure you have a good ground
harleydragon is offline   Quote Quick Reply
Old 09-11-2012, 09:29 AM   #4
Jeeper
 
Join Date: Nov 2011
Posts: 717
tester

I have a flat 4 tester that you can plug into the vehicle and the LED's will light. Don't remember where I got it but it must have been cheap or I wouldn't have bought it. But it is handy. Just plug it in and you can activate the blinkers, lights, etc. and watch the LED's.
ballistx is offline   Quote Quick Reply
Old 09-11-2012, 09:55 PM   #5
Jeeper
 
Join Date: Jan 2011
Location: Eastern Iowa
Posts: 936
It's always the ground when things act strange.
Silverton34 is offline   Quote Quick Reply
Old 09-12-2012, 09:04 AM   #6
Jeeper
 
Join Date: Nov 2011
Posts: 717
ground causing weird lighting

The reason for that is that the current is feeding through the trailer as a ground and back through the other lights. Ends up being a series/parallel circuit now with reduced currents. This causes weird results. That is why just estabilshing the ground between the vehicle and the trailer with the jumper cables corrects the problem.

Usually driving will correct it also as the ball hitch smooths out and makes the ground connection.
ballistx is offline   Quote Quick Reply
Old 09-14-2012, 01:13 PM   #7
Jeeper
 
jetskier111's Avatar
 
Join Date: Feb 2012
Location: Athens, Ga
Posts: 210
Images: 3
I appreciate the help. Im going to redo the ground this weekend and make sure the other wires are OK.

I will post how it goes.

THanks again!!!

__________________
The way to end a frustrating day in grad school? Find a trail and get lost in it.
jetskier111 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 05:18 AM.



Jeep®, 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