Troubleshooting Running Light Circuit of Optronics LED Trailer Lights STL59RB Not Functioning

Question

Question:

I installed lights and wiring harness as per instructions, however I cannot get tail light to work. The pigtail that came with this harness has 3 poles and a ground however it has 4 wires going into the pigtail, Green, Yellow, 2 browns and a white. The yellow and 1 brown are connected to right tail light. The green and 1brown are connected to left tail light. Each tail light has a white ground which I have grounded to trailer. The White wire at the pigtail is also grounded to the trailer. Both blinkers and both brake lights work, however the tail lights will not come on.

asked by: Gary B

0

Expert Reply:

The black wire of the Thinline LED Trailer Tail Light # STL59RB that you referenced needs to have the running light circuit ran to it. This will operate the lower illumination of the light. I'd make sure that the brown wire on each side of your trailer is connected to the black wire of the lights and the stop/turn signal is attached to the red wire as I believe that's your issue.

expert reply by: Jameson C

0

Answer 1

It sounds like the previous lights on your trailer used the mounting hardware for the ground. Your new LED light assemblies have a separate ground wire, which should be attached to a clean, bare metal surface. You will want to make sure that there is…

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Answer 2

Since you are keeping your current taillights on your Grand Design 303RLS I recommend the ThinLine LED Trailer Tail Light #STL64RCB over the #STL64RB as they have a clear lens. When you use these during the day there will be a more pronounced…

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Answer 3

The Thinline LED Trailer Tail Light part #STL59RB is the best fit match we have for the 12" x 2" rear light strips on the RV. This strip measures 12-5/8" long x 1" wide. The screw holes will not line up but you can easily drill…

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Answer 4

A flat 4-pole trailer harness carries three lighting circuits, brake lights, running lights and turn signals. The green wire carries right side turn and brake signals; the yellow wire carries left side turn and brake lights; and the brown wire on the…

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Answer 5

It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side…

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Answer 6

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 7

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 8

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 9

If your trailer has 7 wires running all the way back to the brakes, then yes, you can tap into the existing wiring. Each of your new brakes will have two wires for the brake magnet. One wire is for 12 volt power to the brake magnets and the other…

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Answer 10

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a 7-way…

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Answer 11

You will first want to check the fuses on your tow vehicle. Some vehicles could have fuses for operating the turn signals and brake lights of a towing package. You will want to check if they are installed and working properly. The next thing is to…

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Answer 12

To me it makes the most sense to put a Bike Rack #HLY64FR on the flat towed vehicle rather than above the tow bars. Especially on heavy e-bikes as they are difficult to lift that high onto the rack, but also as it only makes sense to have the rack on…

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Troubleshooting Running Light Circuit of Optronics LED Trailer Lights STL59RB Not Functioning

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