Log in or Sign up

Welcome to Tundras.com!
You are currently viewing as a guest! To get full-access, you need to register for a FREE account.
As a registered member, you’ll be able to:

Participate in all Tundra discussion topics

Transfer over your build thread from a different forum to this one

Communicate privately with other Tundra owners from around the world

Post your own photos in our Members Gallery

Access all special features of the site
Quick Links: Sleeping in bed with a camper shell? Dogs riding in camper shell Looking for advice on a bed cover for a 2018 Tundra sr5 5.5 In the Market for a Tonneau Cover What bed cleats / tie down mounts work with bedcap? Show your setup! I need a pic of someone that has Flex or Bakflip attached to the Bed Rail Deck System

3rd brake light wiring harness for topper?

Discussion in 'Tonneau Covers, Caps and Shells' started by PermafrostTundra, Mar 22, 2025.

Post Reply

Mar 22, 2025 at 4:21 PM

#1

#1
PermafrostTundra [OP] New Member

Joined:

Jun 5, 2024

Member:

#118006

Messages:

5

Gender:

Male

Does anyone know where I can buy a wiring harness to run the 3rd brake light on my camper? Looking for the pigtail type that I can just plug inline with my existing connectors so I don’t have to cut into the factory harness.

Im seeing a few options for 2 wire set up but I’m looking to get a 3 wire set up to run both brake lights and running lights.

Thanks in advance!

PermafrostTundra, Mar 22, 2025

#1

Mar 23, 2025 at 7:06 AM

#2

#2
joe_from_iowa New Member

Joined:

Feb 15, 2021

Member:

#59142

Messages:

93

Gender:

Male

Iowa

Vehicle:

2021 Tundra Double Cab SX

Peeled off the SX stickers from the bed sides. Tyger running boards. A.R.E. DCU topper

I bought this one for my '21 Tundra. https://fbchs.square.site/product/tundra-2014-2021-brake-t-harness/19

joe_from_iowa, Mar 23, 2025

#2

Post Reply

Register FREE to Reply!

Products Discussed in

5Pcs 12V Waterproof Push-Button On-Off Switch, Carbhub 12V Waterproof Push-Button On-Off Switch with 4" Leads for Motorcycle/Auto Car

Cup Holder Divider and Hide for 2022+ Toyota Tundra, Anti-Tipping Insert (Matt Black)

RealTruck TruXedo TruXseal Universal Tailgate Seal | 1703206 | Universal Fitment, Black

Trim-Lok X103HT-25 EPDM Closed Cell Sponge HT (General Acrylic) PSA Rubber Seal, Ribbed, 0.375" Height, 0.625" Width, Rectangle

INNO IN551 Bar End Hook Accessory for Hanging Wetsuits, Towels, Clothing from Roof Rack

Racewill 2024 Upgrade Jerry Can Mount Holder: Lockable Jerry Gas Can Holder Rack, 5 Gallon (20 Liter), Reinforced Welding

Kinverch 500W Car Power Inverter DC 12V to AC 110V Adapter with 2 AC Outlets and 2A USB Charging Port

Vehicle OCD - Center Console Divider and Tray Organizer for Toyota Tundra (2014-2021) - Made in USA - SLX502

ALL-TOP Recovery Board Mount Kit, Universal Bracket for Traction Tracks, Adjustable DIY Lockable Pin Set for Roof Rack, Crossbar & Cargo Basket

AIUITIO 8" Rivet Nut Tool, Rivnut Tool Kit with 9 Metric and SAE Mandrels, Nutsert Rivet Tool Set with 90Pcs Rivnuts, Sturdy Case Packed, Designed for Tight Space

ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs

Rightline Gear Moki Ascent Folding Vehicle Door Step for Car Roof Access As Seen On Shark Tank, 8.75 by 3 by 5.25"

MOEBULB Cargo V-Ring Tie-Down Anchors - Black Steel Bolton Trailer Tie Down for Trucks and Warehouses - Replacement for D-Ring - Plastic Flush Mount Pan Fitting Tiedown 8-Pack

LanHong 2 Pin Way Electrical Wire Connector Waterproof Connector 2 Wire Connector 16AWG Male and Female Plug Quick Disconnect Connector for Car Truck Motorcycle Boat Pack of 12

XFasten Butyl Tape Black, 1/2 in x 30 ft x 1/8 in – Easy-to-Work-with Automotive Butyl Sealant Tape, Mess-Free Rubber Caulk for RV, EPDM Putty for Window, Headlight, Roof, Windshield, and Car Doors

Edge Trims Black Small 0.375" U Height X 0.039" - 0.093" Grip Range (15 Feet)

Cigarette Lighter Socket 12 Volt USB Outlet: PD 20W C and QC3.0 Car Port Aluminum Metal 12V Plug, 150W Charger Panel with Power Switch LED Voltmeter for Marine Boat RV Golf Cart

Eva-Dry Wireless Mini Dehumidifier, White (E-333)

Double Sided Tape Heavy Duty, Waterproof Mounting Foam Tape, 33ft Length, 0.4in Width, Strong Adhesive Tape for LED Strip Lights, Automotive, Home, Office Decor, Outdoor, Made of 3M VHB Tape

ESI Super Cap Seal 20 FT (1 1/2" Width x 1/2" Height x 20' Length) EPDM Rubber for Caps 200 lbs or less

26.25Ft Trunk Bed Rubber Tailgate Seal, Camper Shell Seal Strip Compatible with Pickups, Truck, Automotive.

ESI Ultimate Tailgate Seal with Taper Seal 10ft for use with Truck Caps and Tonneau Covers

SOLAREZ UV Cure Polyester Ding Repair Resin - Surfboard Repair Kit (2 Oz) Sun Cures 100% Dry in Under 3 Minutes! Includes 60/240 Grit Sand Pad. Made in USA!

DC Cargo V-Ring Tie-Down Anchors |10 Pack | 2" Diameter Steel Bolt-on D-Rings for Cargo on Trucks, Pickups, Trailers |Flush Mount Tie-Down Anchor, Replacement for D-Ring Tie-Down w/Plastic Pan Fitting

iBuddy Dog Car Seat Covers 100% Waterproof, Dog Seat Cover with Side Flaps from Scratching, Pet Seat Cover for Back Seat of Car/SUV/Truck Machine Washable…

AA-Racks P-AC-04N Utility Track System Mounting Clamp for Toyota Tacoma/Tundra Truck Cap/Camper Shell, Set of 4 - Black

RoadPro RP8000 10" Indoor/Outdoor Dual Power Fan - Battery and/or 12V

RealTruck Extang Maxseal Truck Bed Tailgate Seal | 1140 | Universal Fitment

Prime-Line F 2589 Sash Lock for Vertical and Horizontal Sliding Windows – Replace Broken Sash Locks for Additional Home Security, 2-1/4” Mounting Hole Centers, Black Diecast (Single Pack)

10 Pcs Bungee Shock Cord Hook for 1/4" and 3/16" Rope Terminal Ends Tabbed S Open Hooks for Kayaks

5-Pack of T-Slot Nuts - Ideal T Slot Nut for Toyota Tunda & Toyota Tacoma Pick-Up Truck Bed Deck Rails - Cleat/Cleats - by Mission Automotive

Heavy Duty Truck Bed Tie Down Anchors Rings Trailers Hook Cargo Bolt on V Ring Pickups Rail Accessories (4 Pack)

MIKEDE Magnets, 20 Pack Strong Neodymium Bar Magnets with Adhesive Backing, Rare Earth Fridge Magnet Heavy Duty, Metal Powerful Magnet for Craft, Whiteboard, Garage, Kitchen - 60x10x3 mm

ESI Front Rail Seal 6ft EPDM Rubber

Ampper White LED Rock Light for Bed Track, 60 LEDs Cargo Pickup Truck Bed Lighting Kit W/Switch Fuse for Truck Bed, Foot Wells, Under Car, Rail Light and More (20 Pcs)

DC Cargo V-Ring Tie-Down Anchors |4 Pack | 2" Diameter Steel Bolt-on D-Rings for Cargo on Trucks, Pickups, Trailers |Flush Mount Tie-Down Anchor, Replacement for D-Ring Tie-Down w/Plastic Pan Fitting

3M Hi-Strength Spray Adhesive 90, 14.6 oz., Industrial Strenght Spray Glue, Dries Clear, Use on Rubber, Glass, Metal, Wood, Foam, Plastic, Cardboard, Fiberglass Insulation, Drywall, and More (90-DSC)

Foam Weather Stripping-2 Rolls, 1" Wide X 3/4" Thick, Insulation Foam Strips with Adhesive for Door,Automotive,Air Conditioner Seal, Total 13 Feet Long (6.5ft x 2 Rolls)

GCI STRONGER BY DESIGN G-1 Clamp. Made in USA with 6000 Series Structural Aluminum to Ensure Quality and Strength. For Mounting Caps, Camper Shells, Toppers to Pickups (2)

Universal Mesh Cargo Net Car Storage Net Wall Sticker Organizer Pouch Bag Storage Mesh Net for Car Trunk Storage Add On Organizers for Car Truck (15" x 9.5" (2 Packs))

6 Pack Sand Stakes for Beach - 12.6" Lightweight Aluminum Tent Stakes for Sand, Snow & Soft Ground, Vibrant Color and Wind-Resistant, Durable and Easy to Install, Rust Resistant U-Shaped Anchors

2 Pieces 10" 15 LED Trailer Tail Light Bar Stop Turn Tail Lights Assembly Third Brake Strip 9 to 30-volt Trailer Identification Light for Marine Boats Trucks Pickups (Red Cover)