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Tekonsha

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Always the correct part
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Complete kit bundle containing all necessary components for your project. Professional-grade components designed for reliable performance and long-lasting durability.
The TEKONSHA Taillight 2-Wire to 3-Wire Converter allows you to safely tow your vehicle with your RV or motorhome. The converter connects the electrical systems of your motorhome and towed vehicle; thus powering the taillights and turn signals on the towed vehicle. This will alert other drivers when braking or making turns, illuminating the towed vehicle's lighting with the motorhome. The converter is designed to create an overall safer towing system for you and other motorists when converting 2-wire RV/motorhome electrical systems to the 3-wire systems of a towed vehicle.
| BRAND: | TEKONSHA |
| PART NUMBER: | 118158 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 0.45 LBS |
Keywords: TK118158-5PK bundle kit, complete kit, professional components, industrial kit, TK118158, Tekonsha

Tekonsha is a leading manufacturer of electronic trailer brake controllers, pioneering the category in the 1970s. The lineup spans proportional units such as the Prodigy P3 and Prodigy iD, time-delayed controllers, the wireless Prodigy RF, plus vehicle-specific wiring harnesses, adapters and trailer brake components engineered for smooth, predictable stopping at any speed.
Tekonsha Engineering Company began in 1964 building RV steps and mirrors. Within a few years it had found its real calling, and by the 1970s Tekonsha was pioneering the manufacture of electronic trailer brake controllers, the product category that still defines the brand. More than half a century later it remains the reference name in trailer braking and is part of the Horizon Global group alongside Reese, Draw-Tite, Fulton, Bulldog and Wesbar.
A brake controller is the component that tells a trailer's electric brakes how hard to work and when, and getting that right is the difference between a controlled stop and a shove from behind. Tekonsha builds both major types. Proportional controllers use an internal accelerometer to sense how quickly the tow vehicle is slowing and apply trailer braking to match, so light braking stays light and hard braking is immediate. Time-delayed controllers ramp to a preset output over a fixed interval, a simpler and more economical approach that suits occasional towing.
The current brake controller range covers most of that ground. The Prodigy iD pairs with a phone through Tekonsha's EDGE technology for setup and monitoring, the P3 offers storable settings for multiple trailers and a trilingual colour LED display, the Prodigy P2 adds a dimmable display and boost mode for heavier loads, and the Voyager keeps operation simple and dependable. The Prodigy RF mounts to the trailer itself and controls wirelessly, which suits rental fleets and drivers who swap tow vehicles.
Installation is supported by vehicle-specific brake control harnesses that plug into a factory connector rather than requiring cut-and-splice wiring, along with mounting brackets and adapters. Matched controller bundles pair a unit with the correct harness. Products are tested to meet and often exceed published industry standards.
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The 118158 is a heavy-duty solid-state relay unit that converts standard motorhome or camper taillight wiring (2-wire) to work with foreign or domestic vehicles that have separate turn and stop lights (3-wire). It allows you to tow a vehicle with independent turn and brake light circuits using a motorhome or camper towing setup.
The 118158 is designed for foreign or domestic vehicles with separate turn and stop lights. It converts motorhome or camper taillight wiring to work with these vehicles. The manual does not specify exclusions or list particular vehicle makes, models, or years.
The 118158 should be mounted at the rear of the towed vehicle. It has adhesive on the bottom for mounting; remove the protective cover before positioning it.
The 118158 has two yellow leads. The yellow input lead connects to the towing vehicle's left turn/brake light. The yellow output lead connects to the towed vehicle's left turn light (rear).
The 118158 has two green leads. The green input lead connects to the towing vehicle's right turn/brake light. The green output lead connects to the towed vehicle's right turn light (rear).
The red output lead connects to the towed vehicle's brake light, or alternatively to a brake light switch.
The white lead is the ground connection and must be connected to the chassis ground of the towed vehicle.
1. Remove the protective cover from the adhesive on the bottom of the 118158. 2. Position the 118158 at the rear of the towed vehicle. 3. Connect the yellow input lead to the towing vehicle's left turn/brake light. 4. Connect the green input lead to the towing vehicle's right turn/brake light. 5. Connect the yellow output lead to the towed vehicle's left turn light (rear). 6. Connect the green output lead to the towed vehicle's right turn light (rear). 7. Connect the red output lead to the towed vehicle's brake light or switch. 8. Connect the white lead to the chassis ground.
The 118158 is a heavy-duty solid-state relay adapter that converts 2-wire motorhome or camper taillight wiring to 3-wire systems with separate turn and brake lights on towed vehicles.
The 118158 mounts at the rear of the towed vehicle using adhesive. Remove the protective cover from the adhesive on the bottom before positioning it.
The 118158 has five leads: yellow (input and output), green (input and output), red (output brake), and white (ground).





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