Mon to Sat 8:00 to 17:30 GMT+8Established 2001 in Dongguan China
[email protected]WhatsApp +86-18717460938
Request A Quote
40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit - Garfour view 1
40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit - Garfour view 240A Fuse Box And 12V Relay Fog Light Wiring Harness Kit - Garfour view 340A Fuse Box And 12V Relay Fog Light Wiring Harness Kit - Garfour view 440A Fuse Box And 12V Relay Fog Light Wiring Harness Kit - Garfour view 540A Fuse Box And 12V Relay Fog Light Wiring Harness Kit - Garfour view 6
Automotive Wiring Harness

40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit

A wiring harness kit combining a 40A fuse box and a 12V relay for automotive fog light and LED bar installations. Auxiliary lighting is the most common accessory added to a vehicle and the most common cause of melted wiring when it is fed off a switch.

  • Integrated fuse box protects the accessory circuit at the battery end
  • 40A relay handles LED bar and fog light current without loading the switch
  • Complete kit so the fitter is not sourcing fuse holders and relays separately
  • Built for 12V vehicle systems across cars, trucks and off-road builds
Request A Quote Email This Specification

Samples ship within 3 days of confirmation. Bulk lead time is typically 7 to 12 days.

Problems It Solves

  • Unfused accessory circuits are a fire risk in the engine bay
  • Dash switches carrying lighting current overheat
  • Mixed-source fuse holders and relays give an untidy and unreliable install

Who It Is For

  • Automotive lighting brands
  • Off-road accessory fitters
  • Workshops fitting auxiliary lighting

Application Scenarios

  • Fog light and driving light installs
  • LED light bar fitting on trucks and off-road vehicles
  • Auxiliary lighting on trailers and work vehicles

Technical Features

  • 40A fuse box
  • 12V relay
  • Fog light and LED circuit wiring
  • Complete kit build

Specifications

Fuse Rating40A
Relay12V automotive
ApplicationFog light and LED wiring
Product CertificatesCE, RoHS

Values shown are the standard build. Connector family, conductor gauge, circuit count and finished length are all build options.

Quality Control And Certification

  • Continuity And Circuit Verification. Verifies the physical arrangement sequence of the harness terminals and the circuit topology between them
  • Circuit Configuration Verification. Confirms that a complete, uninterrupted current flow path exists within each circuit
  • Terminal Retention Strength Test. Measures the mechanical reliability of the connection between the terminal and the wire
  • Ingress Protection Rating Test. Evaluates the dust and water resistance sealing performance of harness connectors

The company is certified to IATF 16949 and UL standards. Samples are confirmed prior to trial or mass production, and the approved sample is the reference for every repeat order.

Customization Options

  • Connector family and terminal type to your part numbers
  • Conductor gauge selected from the current per circuit
  • Finished length and breakout positions to your drawing
  • Jacket colour, marking and labelling to your scheme
  • Packing to your instruction, PE bag and carton as standard

Compared With The Alternatives

Switch-only wiring

A relay keeps the load current off the dash switch and its thin wiring

Loose component kits

A complete harness arrives terminated and consistent every time

Use Guide

  • Mount the fuse box within reach of the battery positive terminal
  • Route the loom away from exhaust heat and secure it every 300mm
  • Match the fuse rating to your light load rather than fitting a larger fuse
Related Products

Other Assemblies In Automotive Wiring Harness

Car Audio Wiring Harness For DEH-P80MP Head Units - Garfour view 1 Automotive Wiring Harness Car Audio Wiring Harness For DEH-P80MP Head UnitsHead unit connection harness for DEH-P80MP audio and video wiring View Specifications 20A Alligator Clip Jumper Battery Charger Harness - Garfour view 1 Automotive Wiring Harness 20A Alligator Clip Jumper Battery Charger HarnessBattery charging harness with 20A alligator clips for boosters and jump starters View Specifications OBD2 Diagnostic Cable Harness For GPS Tracking Devices - Garfour view 1 Automotive Wiring Harness OBD2 Diagnostic Cable Harness For GPS Tracking DevicesOvermoulded OBD II 16 pin harness for vehicle GPS navigation and tracking View Specifications Automotive Chassis Wire Harness Assembly - Garfour view 1 Automotive Wiring Harness Automotive Chassis Wire Harness AssemblyMoulded chassis harness and vehicle cable assembly built to customer layout View Specifications
Related Reading

Guides That Cover This Build

Buying Guide

How To Specify A Custom Wire Harness For Quotation

What a harness manufacturer actually needs from you before a quotation means anything, and what happens when those details are missing.

 Process Guide

Four Tests That Decide Whether A Wire Harness Is Sound

Continuity, circuit configuration, terminal retention and ingress protection, and what each one catches that the others do not.

 Buying Guide

What To Check Before Ordering A Standalone Engine Harness

Crank reluctor generation, throttle type and transmission control decide whether a standalone loom will run your engine at all.

40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit FAQ

What light wattage does this support?

It is built around a 40A relay and fuse box. Send your total light load and we confirm the build.

Is a switch included?

Tell us whether you need the switch supplied and we quote the kit accordingly.

What lead time should we plan for on 40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit?

Sample orders ship within 3 days of confirmation. Production lead time for bulk orders is typically 7 to 12 days, and we confirm the date against your quantity when we quote.

How is 40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit packed for export?

Products are typically individually packed in PE bags and then boxed according to the specified quantity. Tell us any special packing requirement when you place the order.

Do you charge for samples of 40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit?

Samples are charged for the sample and the shipping. The cost and the timing are confirmed with your quotation before anything is built.

Get A Price On 40A Fuse Box And 12V Relay Fog Light Wiring Harness Kit

Tell us the quantity, the finished length and any change to the connector set. We come back with the price, the lead time and a sample plan.

Chat On WhatsApp Email Our Engineers