Why Does Converter 118158 Need Left and Right Blinker/Stoplight Circuits to Function  

I want toIsolating Brake Light Wire Signal for Additional Brake Light on Trailer Question: I want to know how I can isolate the BRAKE light wire signals / brake light from the tow vehicle to a single LED brake light on trailer. How does that work when there is not a 1157 old school incandescent bulb in-line ? Thanks for the help asked by: L.K. Expert Reply: In order to isolate the brake light signal on your trailer when the stop and turn functions are on the same wire, you will want to use a tail light converter. I recommend the Tow Ready Tail Light Converter # 118158. This converter will install on the trailers lighting system to allow you to add a single LED brake light, functioning like a CHMSL, on your trailer. The brake light signal can be isolated on the trailer, so you will not need to touch the vehicles wiring in order to isolate the signal. To install the # 118158 converter, you will want to tap into the trailers right stop and turn signal and the left stop and turn signal. The converter will also need to be grounded to a clean spot on the trailer frame. Two of the wires on the other side of the connector, the isolated turn signal wires, can be bundled together and tucked up out of the way if they are not needed. Then the isolated stop light wire can be ran to the LED brake light. I have attached a diagram showing how the converter will need to be wired on the trailer. I spoke with my contact at Tow Ready and he confirmed that his converter will work well for your LED brake light. expert reply by: Victoria B Victoria B do the same thing. But why do I need to tap both right and left signal? Why cant I just tap either one, but only one?

asked by: Ron