Automotive Electrical Parts: Switches, Cables, Connectors & Fuses

This collection includes everything you need to wire, switch, power, and protect your electrical system. From multi-core cable and relays to rocker switches, inline fuses, terminals, LEDs, and warning lights — ideal for wiring from scratch or upgrading existing looms.

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Smiths Pressure Transducer - Pressure Sender

Smiths Pressure Transducer - Pressure Sender

Genuine Smiths Smiths Oil pressure sender to suit Smiths Classic electrical gauges. Has 1/8NPT thread. This Smiths Classic Pressure sender measures 52mm diameter by 40mm in height (not including the thread or electrical connector).
£82.00
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£82.00
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Engine Oil

CASTROL EDGE 5W-40 Fully Synthetic Engine OilCASTROL EDGE 5W-40 Fully Synthetic Engine Oil
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CASTROL EDGE 5W-40 Fully Synthetic Engine Oil

Advanced full synthetic engine oil for maximum performance and protection. Improves fuel economy and exceeds industry standards.
£13.96
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  • 16.5a Thin Wall Cable Per Metre - Car Builder Solutions16.5a Thin Wall Cable Per Metre - Car Builder Solutions

    16.5a Thin Wall Cable Per Metre - Black

    Modern, high specification, high temperature thin wall low voltage cables suitable for use in the automotive, marine and allied industries.  These cables are specified as standard by many manufacturers throughout Europe due to their high performance characteristics. Low voltage cables are: Suitable for 12v and...
    £0.38
    £0.38
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    • Black / Light Green
  • 25 Amp Thin Wall Cable By The Metre - Car Builder Solutions25 Amp Thin Wall Cable By The Metre - Car Builder Solutions

    25 Amp Thin Wall Cable By The Metre - Black

    Sold by the Metre IF YOU WANT 5 METRES, ORDER 'QUANTITY 5'
    £0.60
    £0.60
    (-0%)
    • Black
    • Blue
    • Brown
    • Green
  • 11 Amp Thin Wall Cable By The Metre - Car Builder Solutions11 Amp Thin Wall Cable By The Metre - Car Builder Solutions
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    11 Amp Thin Wall Cable By The Metre - Black

    Sold by the Metre IF YOU WANT 5 METRES, SELECT 'BY THE METRE' & ORDER 'QUANTITY 5'
    £0.30
    £0.30
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    • Black
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  • Black Standard Relay 40 Amp 4 Pin - Car Builder SolutionsBlack Standard Relay 40 Amp 4 Pin

    Black Standard Relay 40 Amp 4 Pin

    A 40-amp, 4-pin standard relay ideal for switching automotive components like fans, horns, and lamps. Features a removable mounting bracket.
    £4.80
    £0.00
    £4.80
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  • Pre Insulated Blue Female Spade. Pack of 50 - Car Builder Solutions

    Pre Insulated Blue Female Spade 1/4". Pack of 50

    Pack of 50. Secure and reliable blue female spade crimp terminals. Compatible with 6.5mm (1/4") male spades and 1.5 to 2.5mm² copper wire.
    £3.60
    £0.00
    £3.60
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  • Split Sleeving Cable Protection 8.5mm I.D. Per Metre - Car Builder Solutions
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    Split Sleeving Cable Protection 8.5mm I.D. Per Metre

    SOLD BY THE METRE
    £1.50
    £0.00
    £1.50
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  • Lucas Style Connector Bullet Terminal Pack Of 25 - Car Builder Solutions

    Lucas Style Connector Bullet Terminal Pack Of 25

    High-quality brass bullet terminals, ideal for automotive wiring and other applications needing a secure crimp connection. Pack of 25.
    £4.80
    £0.00
    £4.80
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  • 170 amp 25mm² Battery Cable Red Per Metre - Car Builder Solutions170 amp 25mm² Battery Cable Red Per Metre - Car Builder Solutions
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    170 amp 25mm² Battery Cable Red Per Metre

    SOLD BY THE METRE
    £7.20
    £0.00
    £7.20
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  • Split Sleeving Cable Protection 12mm I.D. Per Metre - Car Builder Solutions
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    Split Sleeving Cable Protection 12mm I.D. Per Metre

    SOLD BY THE METRE
    £1.80
    £0.00
    £1.80
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  • Heavy Duty Chrome Toggle Switch On-Off - Car Builder SolutionsHeavy Duty Chrome Toggle Switch On-Off - Car Builder Solutions

    Heavy Duty Chrome Toggle Switch On-Off

    Robust chrome toggle switch. 25A, 12V. Classic Bakelite body. Fits 12mm hole. Ideal for various applications.
    £4.80
    £0.00
    £4.80
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  • Black Single Relay Holder - Car Builder Solutions

    Black Single Relay Holder

    Versatile single relay holder with 5 female spade terminals, compact size, and easy mounting. Ideal for various electrical systems.
    £3.60
    £0.00
    £3.60
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  • Battery Isolator Cut-Off Switch Standard Version - Car Builder SolutionsBattery Isolator Cut-Off Switch Standard Version - Car Builder Solutions

    Battery Isolator Cut-Off Switch Standard Version

    Robust battery isolator cut-off switch. 1000A for 5s, 100A continuous. Two keys, 10mm terminals, easy installation.
    £9.00
    £0.00
    £9.00
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  • 170 amp 25mm² Battery Cable Black Per Metre - Car Builder Solutions170 amp 25mm² Battery Cable Black Per Metre - Car Builder Solutions
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    170 amp 25mm² Battery Cable Black Per Metre

    SOLD BY THE METRE
    £7.20
    £0.00
    £7.20
    (-0%)
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  • Lucas Style Single Connector/Joiner Pack of 10 - Car Builder Solutions

    Lucas Style Single Connector/Joiner Pack of 10

    Reliable push-in bullet connectors with durable hard rubber sleeves. Accepts 4.8mm brass solder terminals. Pack of 10.
    £3.00
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    £3.00
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  • IVA Rocker Switch Terminals Pack of 5 - Car Builder SolutionsIVA Rocker Switch Terminals Pack of 5 - Car Builder Solutions

    IVA Rocker Switch Terminals Pack of 5

    Secure and reliable 3mm bullet terminals for IVA rocker switches. Pack of 5 ensures optimal conductivity.
    £2.40
    £0.00
    £2.40
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  • Lucas Style Double Connector/Joiner Pack Of 10 - Car Builder Solutions

    Lucas Style Double Connector/Joiner Pack Of 10

    Pack of 10 double connectors/joiners. Secure and reliable push-in design. Durable hard rubber sleeve. Accepts 4.8mm brass solder terminals.
    £3.60
    £0.00
    £3.60
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  • 16.5 Amp Thin Wall Cable BUNDLE - Car Builder Solutions16.5 Amp Thin Wall Cable BUNDLE - Car Builder Solutions
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    16.5 Amp Thin Wall Cable BUNDLE

    Bundle of all 12 plain coloured cables.
    £31.20
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    £31.20
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  • 6.5mm Female Terminal For Micro Relay Module - Car Builder Solutions6.5mm Female Terminal For Micro Relay Module - Car Builder Solutions

    6.5mm Female Terminal For Micro Relay Module

    6.5mm female terminal connector for Micro Relay Modules #MRLYCO & #MRLYNO. Ensures secure connections for automotive relays.
    £0.54
    £0.00
    £0.54
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  • Ring Terminal 8mm Hole for 25mm² Battery Cable - Car Builder Solutions

    Ring Terminal 8mm Hole for 25mm² Battery Cable

    Tinned copper 8mm ring terminal for 25mm² battery cables. Solder or crimp connection, ensures reliable electrical contact.
    £0.60
    £0.00
    £0.60
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  • Pre Insulated Red Female Spade 1/4". Pack of 50

    Pre Insulated Red Female Spade 1/4". Pack of 50

    Pack of 50. Red female spade crimp terminals. Secure, insulated connections for 6.5mm (1/4") male spades and 0.5-1.5mm² copper wire.
    £3.60
    £0.00
    £3.60
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  • High Power 5 Volt Twin USB Charger Socket Black - Car Builder SolutionsHigh Power 5 Volt Twin USB Charger Socket Black - Car Builder Solutions

    High Power 5v Twin USB Charger Socket Black

    5v 1 Amp and 5v 2.1 Amp outputs.
    £17.40
    £0.00
    £17.40
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  • Black Change-Over Relay 30 Amp 5 Pin - Car Builder SolutionsBlack Change-Over Relay 30 Amp 5 Pin - Car Builder Solutions

    Black Change-Over Relay 30 Amp 5 Pin

    A reliable 30 Amp 5 pin change-over relay with a removable mounting bracket for easy installation.
    £6.00
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    £6.00
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  • Ring Terminal 10mm Hole for 25mm² Battery Cable - Car Builder Solutions

    Ring Terminal 10mm Hole for 25mm² Battery Cable

    Heavy-duty ring terminal for 25mm² battery cables. 10mm hole, tinned copper, solder or crimp.
    £0.90
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    £0.90
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  • 2 Speed Rotary Wiper Switch - Car Builder Solutions2 Speed Rotary Wiper Switch - Car Builder Solutions

    2 Speed Rotary Wiper Switch

    Your wiper motor must have two-speed winding and park facility for this switch to work correctly.
    £21.60
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    £21.60
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  • CBS 12 Circuit Wiring Module - Car Builder SolutionsCBS 12 Circuit Wiring Module - Car Builder Solutions

    CBS 12 Circuit Wiring Module

    Mounting plate dimensions: 145mm (5¼") x 145mm (5 ¾") Height 75mm (3").
    £118.80
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    £118.80
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FAQs

Got a question? We are here to answer

Build and Upgrade Your Vehicle Wiring

From battery cable to relays and terminals, this electrical collection supports DIY installs and complete rewires alike. All parts are quality-checked, vehicle safe, and chosen for flexibility in classic and custom builds.

Featured Products in This Collection

What You’ll Find in This Range

  • Automotive cable: multi-core, battery, and earth
  • Toggle, rocker, and push-button switches
  • Inline fuses, relays, terminals, and connectors
  • LED warning lights, bulb holders, and bezels

Useful Videos

Modular Wiring System Installation Guide

All components are in stock and ready for next day UK delivery — perfect for workshop builds and wiring projects.