nsautolighting H11 H8 Fog Light Wiring Harness for Toyota Tundra Tacoma — 40A Relay, Illuminated Switch

This nsautolighting H11/H8 fog light wiring harness kit supplies a relay, OEM-style switch and plug-compatible wiring to add or replace fog lights on many Toyota models.

Designed for Toyota owners who need a reliable electrical connection when installing or restoring fog lamps, this harness converts H8/H11/880/881 fittings to a protected 12V relay circuit. The kit includes a 40A relay, an illuminated push-button switch sized for many Toyota consoles, and a long pigtail run so you can route power where you need it without splicing the factory loom.

Which Toyota vehicles and bulb types is this harness compatible with?

This harness fits a broad range of Toyota models and works with common fog lamp sockets. It supports H8, H11, 880 and 881 bulbs and lists compatibility across many model years for Tundra, Tacoma, 4Runner, Land Cruiser, Sequoia, Sienna, Avalon, Highlander, RAV4, Corolla, Camry, Prius lines, Venza, Matrix, Yaris and the Toyota 86.

• Bulb compatibility: H8/H11/880/881 fog lamp sockets
• Vehicle coverage: Toyota models from roughly 2005–2022 as listed in the product details
• Common uses: factory fog light replacement, retrofit kits, add-on auxiliary fogs

How does the wiring harness protect the vehicle's electrical system?

The kit routes power through a dedicated 40A relay and uses 16AWG pure copper conductors, reducing voltage drop and protecting factory circuits. A flame-retardant corrugated sleeve encloses the bundle for abrasion resistance and heat protection during routing.

• Relay: SPST 40A 12V relay isolates lamp current from factory wiring
• Wiring: 16AWG pure copper for efficient current flow up to the harness rating
• Protection: corrugated, flame-retardant housing for durability and safety

What components come in the package and what will I need to check before buying?

The package contains the fog light connector harness, a 40A 4-pin relay and a 33mm x 22mm push-button switch with LED indicator. Fog bulbs are not included; verify the switch dimensions and confirm your fog lamp socket type before purchasing to ensure fitment.

• Included: wiring harness, 40A DC 4-pin relay, illuminated push-button switch
• Not included: fog lights/bulbs and any vehicle-specific trim or mounting hardware
• Buyer checklist: measure switch cutout size and confirm fog lamp socket compatibility

Can I control fog lights independently and avoid dimming when other lights run?

Yes — the relay and independent switch allow separate control of fog lights so they can operate alongside high beams without causing voltage drop across the vehicle's original circuits. That separate feed improves reliability during heavy-load lighting situations.

• Independent control: on/off via included push-button switch
• Reduced voltage drop: direct relay feed prevents dimming under load
• Expandable run: long pigtail wiring for flexible routing to desired lamp locations

Who is this for: This nsautolighting harness is aimed at Toyota owners and installers who want a clean, protected way to replace or add fog lights without cutting into the factory harness. It suits DIY mechanics, shop installers and anyone fitting aftermarket fog or driving lamps who needs a relay-protected, OEM-friendly switch and plug solution. Before ordering, measure the switch opening in your dash and confirm your fog lamp socket type to ensure compatibility.