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Jan 23rd, 2013
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Trailer running lights not working? #12715571
04/13/18 09:38 PM
04/13/18 09:38 PM
Joined: Jun 2016
Posts: 1,068
i-Fish Online content OP
Extreme Angler
i-Fish  Online Content OP
Extreme Angler

Joined: Jun 2016
Posts: 1,068
The trailer brake lights and indicator lights work just fine but my running lights don’t. What gives? Any ideas?


If you can't find em wind em.
Re: Trailer running lights not working? [Re: i-Fish] #12715572
04/13/18 09:39 PM
04/13/18 09:39 PM
Joined: Aug 2004
Posts: 1,766
Mountain Springs/Ray Roberts
B
Bass Buster1 Online content
Extreme Angler
Bass Buster1  Online Content
Extreme Angler
B

Joined: Aug 2004
Posts: 1,766
Mountain Springs/Ray Roberts
Usually ground issues with trailer lights. Each light should be grounded to the trailer and I ground the harness to the trailer. Some ground through the hitch and ball and if it is rusty or greasy it sometimes does not ground out good. You see trailers going down the road lights flickering with every bump, those are grounded through the ball.


See you on the lake and have a great day!
Re: Trailer running lights not working? [Re: Bass Buster1] #12715573
04/13/18 09:42 PM
04/13/18 09:42 PM
Joined: May 2002
Posts: 14,524
Hurst, TX
K.D. Offline
TFF Guru
K.D.  Offline
TFF Guru

Joined: May 2002
Posts: 14,524
Hurst, TX
Either a fuse in the tow vehicle or a ground issue. If I can’t troubleshoot it in a minimum amount of time I usually just rewire the whole trailer so I know it’s done right. Wiring harness is cheap and it doesn’t take much time.

Re: Trailer running lights not working? [Re: i-Fish] #12715582
04/13/18 09:48 PM
04/13/18 09:48 PM
Joined: Oct 2010
Posts: 315
B
blueduck Offline
Angler
blueduck  Offline
Angler
B

Joined: Oct 2010
Posts: 315
Check vehicle fuses, then plug on vehicle, then pigtail if used before residing the trailer. I had problems for almost a year when we going the pigtail was bad.


Dick Hairston
Vietnam VET, Purple Heart
PB: 11-2 (Big O,Florida)
Triton, Merc, Lowrance
"Get the Net"
Re: Trailer running lights not working? [Re: i-Fish] #12715584
04/13/18 09:49 PM
04/13/18 09:49 PM
Joined: Oct 2010
Posts: 315
B
blueduck Offline
Angler
blueduck  Offline
Angler
B

Joined: Oct 2010
Posts: 315
Damn spellcheck, but you get the idea.


Dick Hairston
Vietnam VET, Purple Heart
PB: 11-2 (Big O,Florida)
Triton, Merc, Lowrance
"Get the Net"
Re: Trailer running lights not working? [Re: i-Fish] #12715585
04/13/18 09:49 PM
04/13/18 09:49 PM
Joined: May 2009
Posts: 7,215
Deep in the Heart of Texas
T
Texan Til I Die Online content
TFF Celebrity
Texan Til I Die  Online Content
TFF Celebrity
T

Joined: May 2009
Posts: 7,215
Deep in the Heart of Texas
These posts always amaze me. I could tell you what is wrong in 2 minutes or less if I was standing there with a volt meter, but if we start diagnosing it over the interwebs, it takes a minimum of 2 days and 6 pages to find the answer.


“If ever time should come, when vain and aspiring men shall possess the highest seats in Government, our country will stand in need of its experienced patriots to prevent its ruin.” - Samuel Adams
Re: Trailer running lights not working? [Re: Texan Til I Die] #12715846
04/14/18 12:31 AM
04/14/18 12:31 AM
Joined: Apr 2014
Posts: 428
D
dandeeks Offline
Angler
dandeeks  Offline
Angler
D

Joined: Apr 2014
Posts: 428
Originally Posted By: Texan Til I Die
These posts always amaze me. I could tell you what is wrong in 2 minutes or less if I was standing there with a volt meter, but if we start diagnosing it over the interwebs, it takes a minimum of 2 days and 6 pages to find the answer.


I get your point, why don't you just tell him how to troubleshoot with the volt meter as mentioned ?

Last edited by dandeeks; 04/14/18 12:31 AM.
Re: Trailer running lights not working? [Re: i-Fish] #12716001
04/14/18 01:54 AM
04/14/18 01:54 AM
Joined: Aug 2013
Posts: 4,672
Longview, Tx
Txmedic033 Offline
TFF Team Angler
Txmedic033  Offline
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Joined: Aug 2013
Posts: 4,672
Longview, Tx
Check your vehicle fuses for trailer lights. Take the voltmeter and check your trailer plug to make sure it is getting power to the trailer and then and insert the red into the trailer wire while grounding the black on the trailer. Make sure your trailer lights are supposed to be on while you are doing this. I would start at the trailer tongue since it is both sides. If you have voltage there, try again at the lights and figure out where you are losing power. If you have 12 volts of power all the way to the lights then it is a ground issue. I would bet that it is a ground issue near the tongue since you don't have lights on either side.

Re: Trailer running lights not working? [Re: i-Fish] #12716109
04/14/18 02:52 AM
04/14/18 02:52 AM
Joined: Apr 2005
Posts: 15,647
Lake Fork
armadillo joe Offline
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armadillo joe  Offline
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Joined: Apr 2005
Posts: 15,647
Lake Fork
Mine did that and it was a fuse in my truck.

Re: Trailer running lights not working? [Re: i-Fish] #12716119
04/14/18 03:01 AM
04/14/18 03:01 AM
Joined: Sep 2003
Posts: 145
OKC ,OK , USA
R
Robert Blair Offline
Outdoorsman
Robert Blair  Offline
Outdoorsman
R

Joined: Sep 2003
Posts: 145
OKC ,OK , USA
Fuse on truck or connector, not a ground problem ( since the brake light’s
On the trailer use the same ground as the trailer running lights) the brake lights work, so they must have a ground.

Re: Trailer running lights not working? [Re: i-Fish] #12716527
04/14/18 04:34 PM
04/14/18 04:34 PM
Joined: Dec 2004
Posts: 831
Ft. Worth
S
stratosman201 Offline
Pro Angler
stratosman201  Offline
Pro Angler
S

Joined: Dec 2004
Posts: 831
Ft. Worth
Fuse in truck. I have a 2007 Denali and just revolved the exact issue with a fuse. Does your tow vehicle happen to be a gmc? My fuse was labeled trlr park. Funny name but true.

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