Notices
Marine Electronics Forum

Trailer Lights

Old 04-22-2008, 07:24 AM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Nov 2004
Location: MA, USA
Posts: 5,778
Received 96 Likes on 63 Posts
Default Trailer Lights

I'm using a LED light with two wires (pos & neg) to mount to my guide posts. Can I connect both the brake light and turning signal wires to the same positive lead, and would that work? Just want to make sure it won't short my system.

Thanks.
Old 04-22-2008, 07:44 AM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Oct 2003
Location: Southeastern, MA
Posts: 784
Received 6 Likes on 5 Posts
Default RE: Trailer Lights

Assuming you have a four wire trailer connector, this is how it is wired;

right turn signal / stop light (green)
Left turn signal / stop light (yellow)
taillight / license / side marker (brown) and a ground (white).

So, you should wire the right side LED pos to the Grn, and the left side LED pos to the Yel wire. You can connect you Neg to the trailer but I believe it is better to tie them directly to the wht wire.
Old 04-22-2008, 09:59 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Oct 2006
Location: Southern NH
Posts: 2,624
Received 21 Likes on 10 Posts
Default RE: Trailer Lights

kitebuz - 4/22/2008 10:24 AM

I'm using a LED light with two wires (pos & neg) to mount to my guide posts. Can I connect both the brake light and turning signal wires to the same positive lead, and would that work? Just want to make sure it won't short my system.

Thanks.
If you have separate brake and turn signal lights on your car, then you cannot connect the brake lights from the trailer to both. There are 'splitters' made for this that allow you to connect a car with separate brake/turn signals to standard combined brake/turn signal bulbs on a trailer.

Ken
Old 04-22-2008, 01:11 PM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Jun 2002
Location: Pensacola, Fl.
Posts: 7,371
Likes: 0
Received 6 Likes on 6 Posts
Default Re: Trailer Lights

I'm using a LED light with two wires (pos & neg)
The answer is NO. You do not have Stop/Turn Tailights. Sounds like your trying to use a side marker light.
Old 04-22-2008, 01:26 PM
  #5  
Senior MemberCaptains Club Member
 
Join Date: Feb 2002
Location: North Charleston, SC USA
Posts: 22,073
Likes: 0
Received 28 Likes on 28 Posts
Default RE: Trailer Lights

kev-n-tim - 4/22/2008 10:44 AM

Assuming you have a four wire trailer connector, this is how it is wired;

right turn signal / stop light (green)
Left turn signal / stop light (yellow)
taillight / license / side marker (brown) and a ground (white).

So, you should wire the right side LED pos to the Grn, and the left side LED pos to the Yel wire. You can connect you Neg to the trailer but I believe it is better to tie them directly to the wht wire.
Well, that would have the guidepost lights acting as brake and turn signal lights. I would think they should be wired to the tail light circuit, the same as clearance lights would be. In the example above, the brown wire and trailer frame or white wire.
Old 04-22-2008, 02:11 PM
  #6  
Senior MemberCaptains Club Member
 
Join Date: Oct 2003
Location: Southeastern, MA
Posts: 784
Received 6 Likes on 5 Posts
Default RE: Trailer Lights

rwidman - 4/22/2008 1:26 PM

kev-n-tim - 4/22/2008 10:44 AM

Assuming you have a four wire trailer connector, this is how it is wired;

right turn signal / stop light (green)
Left turn signal / stop light (yellow)
taillight / license / side marker (brown) and a ground (white).

So, you should wire the right side LED pos to the Grn, and the left side LED pos to the Yel wire. You can connect you Neg to the trailer but I believe it is better to tie them directly to the wht wire.
Well, that would have the guidepost lights acting as brake and turn signal lights. I would think they should be wired to the tail light circuit, the same as clearance lights would be. In the example above, the brown wire and trailer frame or white wire.
Yup you are correct. He did specify in the original post, he wanted to wire in Stop and Turn signals.
Old 04-22-2008, 02:16 PM
  #7  
Senior MemberCaptains Club Member
 
Join Date: Oct 2003
Location: Southeastern, MA
Posts: 784
Received 6 Likes on 5 Posts
Default Re: Trailer Lights

warthog5 - 4/22/2008 1:11 PM

I'm using a LED light with two wires (pos & neg)
The answer is NO. You do not have Stop/Turn Tailights. Sounds like your trying to use a side marker light.
Wart, on a standard tail light bulb, isn't one filament used for the tail light and the second filament used for brake / stop signal?
Old 04-22-2008, 02:53 PM
  #8  
Senior Member
 
Join Date: Apr 2008
Location: Saint Cloud, FL
Posts: 972
Likes: 0
Received 1 Like on 1 Post
Default Re: Trailer Lights

kev-n-tim - 4/22/2008 5:16 PM

warthog5 - 4/22/2008 1:11 PM

I'm using a LED light with two wires (pos & neg)
The answer is NO. You do not have Stop/Turn Tailights. Sounds like your trying to use a side marker light.
Wart, on a standard tail light bulb, isn't one filament used for the tail light and the second filament used for brake / stop signal?
You're correct on that, Mike.

BUT ~~ LED lights are a slightly different animal. Most of the combo tail/stop/turn lights I've seen have "X" number of actual LEDs behind the lens - - let's say 10 just to keep it simple. Five of those are used for tail lights, and when the brakes are applied or the turn signal is activated, the other five illuminate, so all 10 are on at that time. If the ones he's got have only two wires, one of them has to be the ground, so the other wire is feeding ALL of the LEDs at the same time. That does tend to imply that what he is using IS actually a side marker light. If it was a combo tail/stop/turn light, it should have 3 wires - - one is ground, one is stop/turn, one is taillight.

So he COULD use these as stop/turn lights, but they won't function as just taillights. They'll be dark until he brakes or puts on the turn signal.

Clear as mud, huh? ;?
Old 04-22-2008, 05:36 PM
  #9  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Nov 2004
Location: MA, USA
Posts: 5,778
Received 96 Likes on 63 Posts
Default Re: Trailer Lights

Yes, you guys are (as usual) right - I am using clearance lights. I ended up with a two spares of the long center led marker light in this pic:


I am using the other (normal) led stop/turn/taillights w/ 3 wires at the normal spots on the trailer.

I am planning on mounting the long strips on the pvc guide posts b/c it would a) look cool b) be more visible to others on the road, & c) will help me when lining up to get back on the trailer at night.

I incorrectly asked my question - I should have asked can I connect the Turn/Stop wire & the Taillight wire to the single positive wire on the led strip (while attaching the 2nd led strip wire to the negative white wire)?

If I have to choose one, I guess it would be the Taillight wire - I was thinking it would be nice for them to indicate braking & turning as well though.

I think ya'll have answered my question (meaning "no"). I got thrown off looking at the taillights on my truck thinking it was the same bulb being used for the tail light and the turn/brake signal at a brighter setting. Apparently, not the case.

Maybe I'll just get a set of the smaller clearance leds to mount on the guide post just above the led strip & connect them to the turn/stop wire...

Thanks for the advice & saving me some time in scratching my head thinking about this.

Mike - we must have met at a BBAC in the past - I'll be there on the 8th as well, so hope to meet you again.
Old 04-23-2008, 07:10 AM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Oct 2003
Location: Southeastern, MA
Posts: 784
Received 6 Likes on 5 Posts
Default RE: Trailer Lights

Ed, your explaination makes perfect sense.

kitebuz, I should be at the next meeting, I will look for you.

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 On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.