Troubleshooting Tail Light Flashing When Connected to Car

Question

Question:

Still no change lights all work when driving but still flash when stopped and everything turned of still flash but is only brake lights that do it not on other trailers only the horse float with electric brakes

asked by: Robert W

0

Expert Reply:

A battery not holding the correct charge would not cause tail lights to flash. If you are experiencing hyperflashing on your trailer tail lights, you most likely have LED lights that are not pulling enough power from the vehicle. To remedy this I recommend using an adapter like the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End # 20142. This will draw power like an incandescent bulb to prevent the LED hyperflashing issue.

If the lights are flashing at the same time, you may have a short or a ground issue.

expert reply by: Jason S

0

Robert

11/12/2018

Still no change lights all work when driving but still flash when stopped and everything turned of still flash but is only brake lights that do it not on other trailers only the horse float with electric brakes

Jason S.

11/12/2018

Because the lights work when driving, yet have issue when stopped the issue is with your ground connection. Make sure every ground connection from your individual trailer lights to your brake magnets are grounded properly to your trailer. Often the ground connection is in the mounting hardware on trailer lights. I recommend using a jump wire from your trailer frame to your brake light ground. Make sure the connection is bare metal to metal and free of corrosion or debris.

Answer 1

If you will be towing a trailer with LED lights then you will likely need to use an adapter with a lamp-out sensor like the Tow Ready #20142 or Curt #C57003 that you referenced. Both of these adapters will accomplish the same task; plugging into an…

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Answer 2

The hyper flashing due to LED lights on your trailer is often solved with the 7-way adapter you mentioned the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End #20142. The issue is often that LED's pull so…

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Answer 3

Both of the parts you mentioned, the Trailer Connector Adapter with Lamp-Out Sensor Bypass #20142 and 7-Way Trailer Adapter #C57003 are universal parts so both will work on your 2020 GMC Sierra 3500. The Curt 7-way adapter is put in our fit guide as…

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Answer 4

This is a great question, and it really depends on your setup. If the safety chain loops on your tow vehicle are spaced far apart then you will need more slack to make a tight turn than if they were closer together. I recommend that you connect your…

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Answer 5

It really depends on your setup, if the safety chain loops on your tow vehicle are spaced far apart then you will need more slack to make a tight turn then if they were closer together. What I would recommend you do is connect your trailer to your…

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Answer 6

The reasoning behind removing the negative cable from your 2021 Chevy Spark's battery isn't a charging/maintaining battery level issue. Chevy has you do this to disable certain functions of your vehicle to allow it to be safely flat towed. As…

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Answer 7

You are correct that load resistors like part #P230004C will fix your issue. I reached out to my contact at Horizon Global, who owns both Bargman and Tekonsha, and he said that it sounds like you have a current path in the mechanical switch system on…

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Answer 8

It sounds like it's possible that the brake light wire from your 3rd brake light might be coming into contact with the electric brake wire on the trailer. The brake controller on your truck will send an intermentent, extremely small amount of…

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Answer 9

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 10

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 11

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 12

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

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