Trailer Directional Light - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 03-30-2009, 04:45 PM   #1
Join Date: Mar 2009
Posts: 1
Rewards Points: 10

Trailer directional light

Right directional light on trailer doesn't blink when the brake pedal is depressed. Left one works fine. How do I correct this?


kevin53 is offline   Reply With Quote
Old 03-30-2009, 05:02 PM   #2
Licensed Electrical Cont.
Speedy Petey's Avatar
Join Date: Feb 2004
Location: NY State
Posts: 7,820
Rewards Points: 1,990

Best bet is too check all the wiring and connections, ESPECIALLY grounds.
Trailer problems although simple can be a pain to diagnose.
I'd say the majority of them are ground related.


Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.
Speedy Petey is offline   Reply With Quote
Old 03-30-2009, 05:20 PM   #3
SDC's Avatar
Join Date: Feb 2009
Location: NH
Posts: 101
Rewards Points: 75

Check the easy stuff first. It is a dual element bulb, check the bulb first.
I'm guessing it is a 4 way flat connection, clean the connections.
SDC is offline   Reply With Quote
Old 03-30-2009, 05:59 PM   #4
joed's Avatar
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 13,456
Rewards Points: 13,712
Blog Entries: 11

First thing to try is a new bulb. Old one could be shorting.
joed is online now   Reply With Quote
Old 03-30-2009, 09:00 PM   #5
Crazy, but lovable
flyboy2610's Avatar
Join Date: Feb 2009
Location: Lincoln, Ne.
Posts: 53
Rewards Points: 75

Does the turn signal on the tow vehicle function properly?
If it does, the problem is in the trailer wring. Check the connection from the turn signal on the tow vehicle to the turn signal wire on the trailer. Make sure that hasn't become loosened. Check the ground from the trailer to the tow vehicle frame. Don't rely on the coupler ball to provide a proper ground,
If the turn signal on the tow vehicle isn't working right, either, replace the flasher unit and see if that helps. If it doesn't, you may have a problem with the turn signal switch.
flyboy2610 is offline   Reply With Quote
Old 03-31-2009, 04:55 AM   #6
Join Date: Aug 2007
Posts: 179
Rewards Points: 150

What kind of vehicle, My Titan came from the factory with the harness in the back and the salesman told me all I had to do was buy the plug to plug into there harness to enable me to hook up a seven pin. Well that was B.S. I had to buy tow relays to get the lights to work properly, my lights were acting wierd like you describe before I installed the relays. All I had to do with the relays was to plug them into the fuse box under the hood in there designated spots ( tow 1 tow 2) and all was well. Or you might need a converter - For use with vehicles that have separate turn and brake light wires. Some vehicles send only one signal per wire, creating what is called a 3-wire system: one wire for the left turn, one wire for the right turn, and one wire for the brake signal (common on vehicles with amber turn signals). A converter will reduce it to a standard 2-wire system needed for wiring a trailer. There are still additional wires for the running lights and for the ground. Any vehicle with amber turn signals will need a converter. However, there are some vehicles with all-red tail lights that can also require a converter. A wiring harness with a converter has a black box built in it. Five wires go into the box, and only 4 come out. The converter transfers the brake signal on the vehicle into the left and right turn signals for the trailer wiring system. check this site, alot a info. Or was everything working at one point and now it don't? If so do as previous posts suggested.
James Con is offline   Reply With Quote
Old 03-31-2009, 08:09 AM   #7
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 7,971
Rewards Points: 1,548

Many directional signal systems do not flash when bulbs are burned out or are the wrong wattage.

If your trailer directionals draw more than a certain amount of current, connecting them to even a "compatible" harness can cause the car's (and the trailer's) directionals to not flash. Some bulb may be steady on and others may stay off.


The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.
AllanJ is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pilot light button on furnace won't turn whydonchathen HVAC 8 01-19-2015 10:40 AM
Marmoleum repairs muggyfrost Flooring 8 10-16-2008 08:19 PM
Light Socket Won't Hold Light Bulb colhollywood Electrical 3 08-16-2008 08:28 AM
Need to replace can light with standard light Woodcutter Electrical 3 02-29-2008 07:06 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1