Auto electrical parts for Perth

Getting the right part matters as much as doing the job well. A cable that’s too thin, the wrong fuse or a connector that lets water in will undo a good install. Search the full range below, then use this page to check you’re buying the right thing.

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Buying guide

Cable

• Size it for the current and the length. Long runs need heavier cable to avoid voltage drop. This matters most for dual batteries, caravans, inverters and winches.
• Check the current rating, not just the size label. Australian automotive cable is often sold under size codes such as “3 mm” or “6 mm”. These don’t always match the copper cross-section, so compare current ratings and conductor area.
• Tinned copper resists corrosion far better than bare copper. Use it on boats, trailers and anything near salt water.
• Twin core (red and black) is neat for accessories, and it makes sure you run a proper earth.

Fuses and circuit breakers

• Every circuit needs a fuse as close to the power source as possible. The fuse protects the cable, so rate it for the cable, not just the device.
• Standard and mini blade fuses suit accessories. Midi, maxi and ANL fuses or circuit breakers suit high-current circuits such as dual batteries and inverters.
• Use a fuse block for fit-outs with several accessories, rather than a string of inline fuse holders.

Connectors and terminals

• Crimp, don’t twist. Use the right crimp tool for the terminal, then seal it with adhesive-lined heat-shrink.
• Sealed connectors such as Deutsch keep water and dust out of joins under the vehicle and in engine bays.
• Anderson plugs are the Australian standard for caravans, campers, battery boxes and solar.
• Trailer plugs: most Australian trailers use 7-pin flat plugs, and caravans usually use 12-pin flat. See boat trailer wiring.

Relays

• Use a relay for anything that draws more current than a dash switch can handle: light bars, work lights, horns, compressors.
• 4-pin relays switch a circuit on and off. 5-pin changeover relays switch between two circuits.

Globes and LEDs

• Check the globe type (H4, H7, H11, 9005 and so on) in your owner’s manual or on the old globe.
• LED replacements in some modern vehicles can trigger bulb-failure warnings, or flash fast as indicators. You may need a load resistor or a CAN-bus compatible LED.
• Any lighting you add must comply with Western Australia vehicle standards. Driving lights must only operate with high beam.

Batteries

• Replace like with like: flooded, EFB or AGM. See car batteries in Perth heat.
• For second batteries, use a DC-DC charger on most modern vehicles. See dual battery setups.