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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Trailer lights
With test light truck lights work, with battery lights work on trailer hook up trailer to truck and lights don't work wtf???
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Thu Jul 06, 2017 7:15 pm |
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Darryle
MMT Pro Member
Joined: Sun Mar 22, 2009 3:44 pm Posts: 250 Location: Fort Worth, Texas
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Re: Trailer lights
Ground?
1244 Atchafalaya Outdoor Designs W/ 12hp Copperhead
_________________ 2017 Atchafalaya Outdoor Designs 1244 2017 Copperhead 12hp
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Thu Jul 06, 2017 7:28 pm |
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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Re: Trailer lights
That's what I thought it was. I hooked a jumper from a battery to the trailer plug and all the lights work. I also checked the truck with a test light. When I plug the trailer into the truck none of the trailer lights work. I also cleaned all the ground connections on the lights on the trailer and used electric grease. Any ideas?
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Thu Jul 06, 2017 7:47 pm |
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Russ
MMT 1000 Club
Joined: Mon Dec 31, 2012 11:07 pm Posts: 4820 Location: West Monroe, LA
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Re: Trailer lights
To test, run a seperate ground from the trailer to the truck.
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Thu Jul 06, 2017 7:54 pm |
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jc
MMT 1000 Club
Joined: Sun Oct 24, 2010 7:19 pm Posts: 1103
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Re: Trailer lights
I would bet the ground wire on the truck isn't connected. Hook your trailer up to your truck and use a jumper wire to connect to a good ground on the truck and a good ground on the trailer. I bet they will work then.
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Thu Jul 06, 2017 7:57 pm |
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jc
MMT 1000 Club
Joined: Sun Oct 24, 2010 7:19 pm Posts: 1103
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Re: Trailer lights
Russ beat me to it.
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Thu Jul 06, 2017 7:57 pm |
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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Re: Trailer lights
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Thu Jul 06, 2017 7:57 pm |
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jc
MMT 1000 Club
Joined: Sun Oct 24, 2010 7:19 pm Posts: 1103
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Re: Trailer lights
Truck chassis to trailer
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Thu Jul 06, 2017 7:59 pm |
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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Re: Trailer lights
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Thu Jul 06, 2017 8:17 pm |
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Darryle
MMT Pro Member
Joined: Sun Mar 22, 2009 3:44 pm Posts: 250 Location: Fort Worth, Texas
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Re: Trailer lights
Are you 100% sure the truck is wired correctly, does the truck have amber rear turn signals?
If so, is the harness converter working properly? Factory wiring on the truck? What yr truck?
1244 Atchafalaya Outdoor Designs W/ 12hp Copperhead
_________________ 2017 Atchafalaya Outdoor Designs 1244 2017 Copperhead 12hp
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Thu Jul 06, 2017 9:07 pm |
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CypressCritter
MMT F.E.
Joined: Tue Aug 26, 2014 10:36 am Posts: 822 Location: Jefferson TX
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Re: Trailer lights
I had a similar problem, all lights on truck worked but trailer lights would not! When I started I checked the truck and it was working, but for some reason the first time I pluged in the trailer it blew 2 fuses on truck(2007 F150) and the truck lights still worked because they were on a separate fuse. They do make a plug that is a circuit tester for the 4 pin that all it has is indicator lights that show if all "circuits" are working at the plug on truck.
_________________ SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac) Uncle J Custom - 19x54 CC Skiff w/40XD GTR
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Fri Jul 07, 2017 8:04 am |
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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Re: Trailer lights
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Fri Jul 07, 2017 9:24 am |
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Russ
MMT 1000 Club
Joined: Mon Dec 31, 2012 11:07 pm Posts: 4820 Location: West Monroe, LA
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Re: Trailer lights
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Fri Jul 07, 2017 9:36 am |
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reharbert
MMT Addict
Joined: Tue Mar 17, 2015 1:38 am Posts: 606 Location: Beaumont, Texas
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Re: Trailer lights
If the test light is working in all ports (turn/stop, and park) you can trace it down from there.
Bad plug on trailer side Cut in the wiring somewhere Bad ground (you say you eliminated this) Corrosion at light connections Bad grounding at lights. (Most use the trailer frame and not direct wiring)
_________________ Uncle J - 17 x 48 w/GTR | Bayou Surface Drive heads | Voodoo exhaust | DIY Mikuni carb
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Fri Jul 07, 2017 9:42 am |
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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Re: Trailer lights
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Fri Jul 07, 2017 9:44 am |
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Darryle
MMT Pro Member
Joined: Sun Mar 22, 2009 3:44 pm Posts: 250 Location: Fort Worth, Texas
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Re: Trailer lights
_________________ 2017 Atchafalaya Outdoor Designs 1244 2017 Copperhead 12hp
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Fri Jul 07, 2017 10:21 am |
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lastchance
MMT 1000 Club
Joined: Wed Feb 09, 2011 1:56 pm Posts: 1646 Location: Chauvin
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Re: Trailer lights
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Fri Jul 07, 2017 11:23 am |
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Darryle
MMT Pro Member
Joined: Sun Mar 22, 2009 3:44 pm Posts: 250 Location: Fort Worth, Texas
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Re: Trailer lights
It's aftermarket, mine is a Curt brand. Uhaul may have one
1244 Atchafalaya Outdoor Designs W/ 12hp Copperhead
_________________ 2017 Atchafalaya Outdoor Designs 1244 2017 Copperhead 12hp
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Fri Jul 07, 2017 4:11 pm |
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