trailer turn signal ?

This topic has 10 replies, 5 voices, and was last updated 12 years, 2 months ago by Bass Cat Boats.

Viewing 11 posts - 1 through 11 (of 11 total)

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March 24, 2014 at 1:21 am #354503

P4SHOcat
Participant

Hi guys, My right turn signal on my P4 trailer does not work. The left one works fine. The right one does light up but does not flash. My truck turn signals work fine. I thought it was a bad turn signal filament so I replaced the whole light assembly, still no right turn signal. Any body got some other ideas why the light works but turn signal does not? Thanks. Ed

March 24, 2014 at 1:35 am #354508

Bass Cat Boats
Keymaster

$5 says your brake light doesnt work either. Its the green wire coming from the multi pin power through the Wesbar harness. Turn the parking lights on, now Crossways 90 degrees, Plug the brown wire pin on the truck harness into the green pin on the trailer and see if your brake light works? If not then it probably is in the trailer, if it does then its on the truck.

March 24, 2014 at 1:37 am #354512

Preacherboy
Participant

I had one not working on mine too and out new lights in both sides and still one side wouldnt flash. Checked the truck and found that it was in the truck somewhere. Traced it all the way back to a seperate set of fuses under the hood of my Ford diesel that I didnt know I had that are for the trailer plug. New fuse after a lot of head scratching and was good to go.

March 24, 2014 at 1:40 am #354516

1MANSHOWW
Participant

Switch your two trailer lights around. Plug the left in the right, and the right in the left and see if the problem follows.The best invention for trailer wire problem finding, is to get the truck side version of the plug, and put ring terminals on the ground, running lights, brakes/turn signals, and backup lights. Then you can use a spare battery to run which ever circuit you are testing. You know it works from that far back and you just follow it till it fails.Im usually swearing at a bad ground.

March 24, 2014 at 1:47 am #354519

bcshineon
Participant

Ive had the same problem with several different trailers. Its always the same trailer light fuse under the hood. Its happened on two different GMC diesal pickups.

March 24, 2014 at 1:56 am #354523

P4SHOcat
Participant

Thanks guys, Ill check the fuse in the truck first. I just do not understand why the light is on but the flasher will not flash. If it is the fuse why would the marker lights and the tail light still work. BCB, I can not tell if the brake light is working since I can not be in two places at once lol. Will get someone to check that for me. Thanks again for the help from the “family”.Last edited by P4SHOcat on March 24th, 2014, 1:58 am, edited 1 time in total.

March 24, 2014 at 2:05 am #354526

Bass Cat Boats
Keymaster

Maker lights and brake/signal lights have different fuses.

March 24, 2014 at 2:05 am #427814

Bass Cat Boats
Keymaster

Maker lights and brake/signal lights have different fuses.

March 24, 2014 at 2:22 am #354532

Bass Cat Boats
Keymaster

You dont need another harness for the truck as you can be sure the ball is grounded and just turn the existing plug 90 degrees to each other plugging in only one pin. Flashers work same as brakes of you hit the emergency flashers. Use the brown wire pin on the truck and leave the parking lights on. Just plug them in 90 degrees on ne pin at a time and check the lights for operation.

March 24, 2014 at 2:31 am #354535

Bass Cat Boats
Keymaster

Ok if I turn my flashers on, only the left side flashes. So does that mean its the wiring, or the fuse. Im a little electrically challenged lol Ed. Thanks

March 24, 2014 at 2:38 am #354538

Bass Cat Boats
Keymaster

Ed, you have a test lit fixture built into the system. Go to the front of the trailer, unplug the lights and plug the two plug/receptacle pieces in sideways 90 degrees to each other. Look at the wires into the rubber flat plugs, use the one with a brown wire on the truck and plug it in to the green wire corresponding pin on the trailer. If the parking lights are on the right tail light should glow red for brakes/turn signal. Now do the yellow wire and the left tail light should glow red. Brown – Tail LightsYellow – Left Brake/Turn SignalGreen – Right Brake/ Turn SignalBlue – Reverse Solenoid/Back Up Light(s)White – Ground under coupler/ Safety Cable area
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