Adding a Third Brake Light to a Small Camper Trailer

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Question:

Will the Optronic sealed streamline LED fixture work with regular incandescent taillights. Hope to use as a 3rd brakelight on small camper. Or is there a incandescent similar light? thanks

asked by: Mike

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Expert Reply:

You could use light # STL79RB as a third brake light. Normally it is not recommended to mix LED lights at incandescent lights because the lights don't have voltage/amperage regulators and an incandescent light could draw too much power through an LED and burn it out.

But it would work fine in this case because in order to have a third brake light you would have to separate out the combined turn signal/brake light circuits to get a dedicated brake light only function for a third brake light.

Trailers have a combined system meaning they have one wire for left turn and brake lights and one wire for right turn and brake lights. To use a third brake light you can't just wire in to a combined circuit because it will blink with the turn signal.

You would need converter # 118158. And then you would need 2 diodes, # RM-690, to prevent back feeding. I have included a diagram showing how it should wire up. If your trailer does happen to have one wire for turn signals and a separate wire for brake lights only then you need to just splice into the brake light wire and would not need the converter or diodes.

expert reply by: Michael H

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Answer 1

The Thinline LED Trailer Tail Light part #STL64RB is a three function light with those functions being stop, turn, and running. It has a three wire design with the white wire being ground, the black wire for the tail lights, and the red wire for the…

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Answer 2

Hey Pete, so to add a third brake light that uses two wires to your 3 wire system you're going to need to use #118158 to splice into your combined right/stop and left/stop wiring, then connect your 3rd LED brake light to the stop output on the…

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Answer 3

As your 7-Way pin connector uses separate turn signals and brake light wiring you will need the to create a custom harness to be able to have everything function properly including the electric brakes. First you will start with the Pollak Heavy-Duty,…

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Answer 4

Since your trailer uses a combined wiring system where the stop and turn signals run on the same circuit, in order to add a third brake light to your trailer you would need to use a 2-Wire to 3-Wire Converter, like part #118158. This will convert the…

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Answer 5

Although it is not required by law, what you are wanting to do is certainly possible. Because trailer tail light systems combine the stop lamp and turn signals for each side onto a single circuit, you will need to use a vehicle-to-vehicle tail light…

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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

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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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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Adding a Third Brake Light to a Small Camper Trailer

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