trailer lights - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-25-2012, 04:42 AM
Registered User
 
Last photo:
Join Date: Nov 2009
Location: cherry hill NJ
Posts: 305
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
trailer lights

trailer lights im stuck probably something i just missed. i have a toyota 94 pickup it has the separate light system breaks on one bulb turn signal on another bulb etc....so the trailer wire kit comes with the 4 wire plug ok so i get the adapter kit for my truck it has an extra wire for the break light molded into the plug .... got every thing hooked up yellow and brown wires go to the left side green and brown to the right white wire is ground ok here's the problem drivers side ( left) works great turn signal, break, and running lights work. but on the right side is not i got power to the plug at the truck connection. using the test light it flashes as the tail light on the truck works. got power to the green wire using the test light. but when i plug in the unit i got nothing. the running light side of the light works ( brown wire) but no turn signal but the green wire shows power i even hooked an extra ground wire inside next to the bulb and grounded it that way still nothing i swapped out the unit for a new one at pep boys thought it might be defective no problem they gave me a new unit hooked it up same thing tail light works no turn signal. turn signal and break lights are on the same circuit i even tryed an old trailer light i had laying around here nothing this has me stumped it has power at the wire so why no turn signal or break

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-25-2012, 06:11 AM
67Mustang Al.'s Avatar
Registered User
 
Last photo:
Join Date: Jan 2009
Location: Tasmania, Australia.
Posts: 432
Wiki Edits: 0

Thanks: 2
Thanked 6 Times in 6 Posts
[QUOTE=wayneooo]trailer lights im stuck probably something i just missed. i have a toyota 94 pickup it has the separate light system breaks on one bulb turn signal on another bulb etc....so the trailer wire kit comes with the 4 wire plug ok so i get the adapter kit for my truck it has an extra wire for the break light molded into the plug .... got every thing hooked up yellow and brown wires go to the left side green and brown to the right white wire is ground ok here's the problem drivers side ( left) works great turn signal, break, and running lights work. but on the right side is not i got power to the plug at the truck connection. using the test light it flashes as the tail light on the truck works. got power to the green wire using the test light. but when i plug in the unit i got nothing. the running light side of the light works ( brown wire) but no turn signal but the green wire shows power i even hooked an extra ground wire inside next to the bulb and grounded it that way still nothing i swapped out the unit for a new one at pep boys thought it might be defective no problem they gave me a new unit hooked it up same thing tail light works no turn signal. turn signal and break lights are on the same circuit i even tryed an old trailer light i had laying around here nothing this has me stumped it has power at the wire so why no turn signal or break [/QUOTE
Here is a link for a trailer wiring diagram with a 4 wire plug suggesting the use of a CONVERTER.
Cheers
Al

http://crittersworld.tripod.com/trailerwire.html
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-25-2012, 10:31 AM
Cape Cod Bob's Avatar
Registered User
 
Last wiki edit: How to title a hot rod Last photo:
Join Date: Jul 2007
Location: MA
Posts: 1,126
Wiki Edits: 1

Thanks: 0
Thanked 29 Times in 19 Posts
So ,everything works except the rt.turn. You have it traced to the truck plug and is infact working (flashing) to that point. When you plug the truck plug into the trailer plug you don't get the rt. turn trailer light flashing. Correct.
Therefore, the problem lies between that trailer plug and the light rt. bulb.
I suugest checking continuity between the trailer plug and the contact in the bulb socket for the rt. turn. If that is good then check continuity between that socket base and ground.
If that is good then maybe the trailer plug is bad. Is it a vulcanized plug or can you take it apart.
Keep digging untill you find it.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-25-2012, 02:47 PM
Registered User
 
Last photo:
Join Date: Oct 2007
Location: Portland,Or
Posts: 838
Wiki Edits: 0

Thanks: 0
Thanked 43 Times in 37 Posts
The wires on a four wire trailer plug are usually ground, tail/marker, right turn, and left turn.
Standard trailer wiring has Brown for Tail/marker. Green for one side turn, Yellow for the other side turn, and the ground, usually white.

The adapter will have in wires for right turn, left turn, and brake light.
The adapter will only have an out wire for right turn, and left turn.

The taillight wire and the ground wire just go past the adapter without connecting to it, from the truck to the trailer plug.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-25-2012, 03:46 PM
EOD Guy's Avatar
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Alabama
Posts: 2,058
Wiki Edits: 0

Thanks: 1
Thanked 133 Times in 124 Posts
Sounds like the wiring back to the tail light has a fault..... Try running a long jumper from the truck plug, not the trailer, back to the tail light.... if it works.... well you already know what to do....
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-26-2012, 04:13 AM
Registered User
 
Last photo:
Join Date: Nov 2009
Location: cherry hill NJ
Posts: 305
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
tryed a jumper wire same thing guess ill have to get under the truck and see if its grounded right maybe a ground came off
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-26-2012, 05:34 AM
Registered User
 
Last photo:
Join Date: Mar 2010
Location: georgia
Posts: 83
Wiki Edits: 0

Thanks: 0
Thanked 16 Times in 14 Posts
If you are having grounding problems, make sure you are grounding to the truck frame. Toyota does not ground the bed to the vehicle and it may or may not be grounded through the mounting bolts. The tail light grounding point is usually the mud flap bracket.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-26-2012, 04:42 PM
EOD Guy's Avatar
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Alabama
Posts: 2,058
Wiki Edits: 0

Thanks: 1
Thanked 133 Times in 124 Posts
Ok, using a test light with the ground wire grounded to the truck frame, touch it to the truck plug and see it you get a blinking light at the trailer plug...... if you do then it's the trailer pig tail (cause you already tried the long jumper) if you don't then try the screw terminal behind the truck plug where the wire attaches..... see it you get the blink, then the Tee connector where the trailer recepticle ties into the tail light harness etc....
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
accessory lights dim when head lights turned on 36int Electrical 8 04-10-2011 11:59 AM
Wiring a trailer lights lanierledford Electrical 4 05-07-2010 10:45 PM
Trailer Lights Dave E Shank Electrical 4 11-28-2008 09:28 AM
can't wire trailer lights alabamasho Electrical 7 03-13-2008 07:13 PM
79 TA: dash lights and tail lights fuse keeps blowing Gladis Electrical 6 12-01-2007 12:43 AM


All times are GMT -6. The time now is 08:34 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.