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Roadmaster Brake-Lite Relay Kit for Towed Vehicles

Retail: $65.53
Our Price: $45.05
In Stock
Relay works with your tow bar wiring system to ensure that your towed vehicle's turn signal lights flash in tandem with your RV's lights.No - You will need a brake light relay to ensure proper activation of your towed car's signal lights. Yes - You do not need a brake light relay. Installation of the Roadmaster Brake-Lite Relay Most towed cars require the normally open installation method.
  • Brake Light Relay
  • Roadmaster

CURT 7-Way/4-Way Trailer Connector and Relay Kit

Our Price: $85.58
Finish your Nissan Armada or Titan tow package with a dual 7-way/4-way socket and relay kit. USCAR plug-in connector mounts at the hitch, while included relays complete the power and signal circuits.Specs Connector Types: 7-way RV blade trailer connector 4-way flat trailer connector USCAR vehicle-side connector Relay Kit: Large brown relay activates the 12V power circuit 2 small blue relays activate turn signal circuits Construction and Protection: Spring-loaded dust covers Rubber gasket helps keep moisture and debris out of the socket Pre-greased terminals Steel mounting bracket Gloss black powder coat finish Included Components: Dual-output socket Relay kit Steel mounting bracket Mounting screws
  • 4 Flat
  • 7 Blade
  • Plug-In
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • CURT
  • Factory Tow Package

60-Amp Relay Kit for Redarc In-Vehicle BCDC Battery Charger

Retail: $139.25
Our Price: $125.00
In Stock
Relay kit allows your Redarc BCDC dual-input battery charger to recognize a smart alternator without a direct connection to the ignition source. ...
Features: Relay kit allows your Redarc BCDC dual-input battery charger (331-BCDC1225D or 331-BCDC1240D) to recognize a smart alternator without a direct connection to the ignition source Great for chargers installed in a trailer or other location where running an ignition wire from the vehicle is problematic 60-Amp, sealed changeover relay triggers the charger to switch over to the more efficient charging option 3/8" Contact pins ensure solid connection points for optimized performance Kit includes 60-Amp, sealed changeover relay with 3/8" contact pins Heat shrink Relay holder Butt-splice connectors Instruction sheet 2-Year warranty For a diagram on how to wire the relay kit, see below:
  • Trailer Brake Controller
  • Relays
  • Redarc

Buyers Products Pre-Wired Switch Box w/ Relay and Circuit Breaker - Fused - Backlit - 6 Function

Retail: $119.59
Our Price: $97.08
In Stock
  • Switch Box
  • Wiring
  • Switches
  • Buyers Products

Curt Relay Kit for Nissan Armada or Titan Aftermarket Tow Package

Retail: $49.30
Our Price: $33.76
In Stock
This kit includes the 2 small blue relays and 1 large brown relay that are required to complete the circuits for your Nissan Armada or Titan's non-factory-installed tow package.Features: Complete circuits required for towing with a 7-pole trailer connector (sold separately) Large, brown relay activates 12-volt power circuit Small, blue relays activate turn signals Required for Nissan Armada and Titan models that do not have factory-installed tow packages Note: Some Nissan vehicles will require a 3rd blue relay (38666-1).
  • Trailer Wiring
  • Relays
  • CURT

Buyers Products Pre-Wired Switch Box w/ Relay and Circuit Breaker - Fused - Backlit - 4 Function

Retail: $127.04
Our Price: $81.46
In Stock
  • Switch Box
  • Wiring
  • Switches
  • Buyers Products

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord - RM-15267

Retail: $280.35
Our Price: $164.61
In Stock
This complete kit includes everything you need to connect your RV's tail, brake, and turn signal lights to your towed car. Diodes prevent damage from electrical feedback. Includes 7-way to 6-way coiled adapter cord and 6-way socket.Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Curt Custom Tail Light Wiring Kit for Towed Vehicles - C96JR

Retail: $159.95
Our Price: $104.66
In Stock
Plug-and-play custom harness gets turn and brake signals on your towed car with no hardwiring or splicing, and no effect on your warranty. The built-in diodes protect your car from electrical feedback.Other drivers will see that you're slowing down, but not that you're making a turn. With a brake light relay, you can signal both and travel safely.
  • 4 Flat
  • Plugs into Vehicle Wiring
  • Wiring Harness
  • CURT
  • Custom Fit

Demco Air Force One Flat Tow Brake System for 2021 and Newer Freightliner Chassis RVs w/ BrakeSync - DM23MV

Retail: $1,518.00
Our Price: $1,277.00
In Stock
Complete the factory prep package on your 2021 or newer Freightliner chassis motorhome so you can flat tow your vehicle with the Air Force One supplemental braking system. Includes all needed components and the convenient wireless Coachlink monitor.It meets Federal Motor Vehicle Safety Standard (FMVSS) guidelines requiring that supplemental braking systems use a separate air supply and activation relay valve. On the other side of the air tank, the service relay valve taps into the coach's metered air line and the delivery relay valve connects to the quick-disconnect air valve on the back of the motorhome.
  • Fixed System
  • Air Brakes
  • Brake Systems
  • Proportional System
  • Demco
  • One-Time Setup
  • Vehicle Battery
  • Indicator Lights

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - 7-Way to 6-Way Adapter Cord - RM38FR

Retail: $283.11
Our Price: $255.11
In Stock
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This complete kit includes everything you need for multiplex LED tail lights.This kit is designed to work with LED lights only, so if you have incandescent variable voltage lights, you'll need kit RM26FR (sold separately) instead. Do I Need a Brake Light Relay? If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Demco Air Force One Flat Tow Brake System for 2020 and Newer Tiffin Chassis RVs w/Factory Air Brakes - DM55MV

Retail: $1,518.00
Our Price: $1,277.00
In Stock
Complete the factory prep package on your 2020 and newer Tiffin chassis motorhome so you can flat tow your vehicle with the Air Force One supplemental braking system. Includes all needed components and the convenient wireless Coachlink monitor.It meets Federal Motor Vehicle Safety Standard (FMVSS) guidelines requiring that supplemental braking systems use a separate air supply and activation relay valve. On the other side of the air tank, the service relay valve taps into the coach's metered air line and the delivery relay valve connects to the quick-disconnect air valve on the back of the motorhome.
  • Fixed System
  • Air Brakes
  • Brake Systems
  • Proportional System
  • Demco
  • One-Time Setup
  • Vehicle Battery
  • Indicator Lights

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - 7-Way to 6-Way Adapter Cord - RM63MR

Our Price: $235.03
In Stock
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This complete kit includes everything you need for multiplex LED tail lights.This kit is designed to work with LED lights only, so if you have incandescent variable voltage lights, you'll need kit RM26FR (sold separately) instead. Do I Need a Brake Light Relay? If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - RO44FR

Our Price: $180.14
In Stock
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This kit is for variable voltage/multiplex LED tail lights.This kit is designed to work with LED lights only, so if you have incandescent variable voltage lights, you'll need kit RO94FR (sold separately) instead. Do I Need a Brake Light Relay? If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit.
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Blue Ox 4-Diode Universal Tail Light Wiring Kit for Towed Vehicles - BX8848

Retail: $109.00
Our Price: $87.44
In Stock
This wiring kit carries brake and turn signals from your motorhome to your towed car while you're flat towing. Diodes protect your car from damage from electrical feedback.Other drivers will see that you're slowing down, but not that you're making a turn. With a brake light relay, you can signal both and travel safely.
  • Splices into Vehicle Wiring
  • Diode Kit
  • Blue Ox
  • Universal Fit

Demco 4-Diode Universal Tail Light Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord - DM9523010-54

Our Price: $227.96
In Stock
This complete kit includes everything you need to correctly display your RV's brake and turn signals on your vehicle tail lights. Includes coiled 7-way to 6-way adapter cable and 6-way car-side socket.Other drivers will see that you're slowing down, but not that you're making a turn. With a brake light relay, you can signal both and travel safely.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Demco
  • Universal Fit

Demco Air Force One Flat Tow Brake System for 2019 and Newer Spartan K2 400 RVs w/ Safe Haul - DM54YV

Our Price: $1,306.59
In Stock
Complete the Safe Haul factory prep package on your 2019 or newer Spartan motorhome so you can flat tow your vehicle with the Air Force One supplemental braking system. Includes an air jumper hose with the Safe Haul-specific fitting.It meets Federal Motor Vehicle Safety Standard (FMVSS) guidelines requiring that supplemental braking systems use a separate air supply and activation relay valve. On the other side of the air tank, the service relay valve taps into the coach's metered air line and the delivery relay valve connects to the quick-disconnect air valve on the back of the motorhome.
  • Fixed System
  • Air Brakes
  • Brake Systems
  • Proportional System
  • Demco
  • One-Time Setup
  • Vehicle Battery
  • Indicator Lights

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - RM47ZR

Our Price: $158.97
In Stock
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This kit is for variable voltage/multiplex LED tail lights.This kit is designed to work with LED lights only, so if you have incandescent variable voltage lights, you'll need kit RO94FR (sold separately) instead. Do I Need a Brake Light Relay? If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit.
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Way Flat Connectors - RM-154

Retail: $144.95
Our Price: $104.85
In Stock
This wiring kit carries your RV's brake and turn signals to your towed car's tail lights. Diodes prevent damage from electrical feedback. Connects RV and towed car with 4-pole flat plugs. Includes installation hardware.Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation.
  • 4 Flat
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Hybrid Adapter Cord - RM-152-1676-7

Our Price: $274.76
In Stock
This complete kit includes everything you need to carry your RV's brake and turn signals to your towed car's tail lights. Diodes prevent electrical feedback. The hybrid coiled/straight adapter cord is ideal for tow bars with channel guides.Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster Smart Diode Kit for Variable Voltage Incandescent Tail Lights - 7-to-6-Way Adapter Cord - RM26FR

Retail: $340.57
Our Price: $283.52
In Stock
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This complete kit includes everything you need for multiplex incandescent tail lights.This kit is designed to work with incandescent lights only, so if you have LED variable voltage lights, you'll need kit RM38FR (sold separately) instead. Do I Need a Brake Light Relay? If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster Universal Hy-Power Diode Wiring Kit - RM-152

Retail: $147.97
Our Price: $88.65
In Stock
Diode kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. Wires 2-wire and 3-wire systems to operate as a combined lighting systems. Connectors and Extension loop sold separately.Your vehicle will still function as designed when not hooked up to your RV. Do You Need a Brake Light Relay? Because this kit wires your vehicle as a combined system, a brake light relay (RM-88400 - sold separately) may be required if you use a supplemental braking system with your towing setup.
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster Smart Diode Kit for Variable Voltage Incandescent Tail Lights - RO94FR

Retail: $152.49
Our Price: $140.59
In Stock
Smart diodes are our favorite option for getting brake and turn signals on your towed car. They are really well-made and reliable, plus pretty easy to install. This kit is for variable voltage/multiplex incandescent tail lights.This kit is designed to work with incandescent lights only, so if you have LED variable voltage lights, you'll need kit RO44FR (sold separately) instead. Do I Need a Brake Light Relay? If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit.
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit - RM-15247

Retail: $290.64
Our Price: $171.50
In Stock
Diode kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. Wires 2-wire and 3-wire systems to operate as a combined lighting systems. Includes 7-wire to 4-wire Flexo-Coil electrical cord.Your vehicle will still function as designed when not hooked up to your RV. Do You Need a Brake Light Relay? Because this kit wires your vehicle as a combined system, a brake light relay (RM-88400 - sold separately) may be required if you use a supplemental braking system with your towing setup.
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Straight Adapter Cord - RM-152-98146-7

Our Price: $171.68
In Stock
This complete kit includes everything you need to carry your RV's brake and turn signals to your towed car's tail lights. Diodes prevent electrical feedback. The straight 7-to-6-wire adapter cord is ideal for tow bars with channel guides.Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation.
  • 7 Blade to 6 Round
  • Splices into Vehicle Wiring
  • Diode Kit
  • Roadmaster
  • Universal Fit