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Monday 7am - 5pm Tuesday 7am - 5pm Wednesday 7am - 5pm Thursday 7am - 5pm Friday 7am - 5pm Saturday 7am - 12pm

Simms Electrical

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Simms Electrical

Best automotive electrical fit out and repair service in Auckland. An iconic trusted NZ business. Call or pop in today! Heavy Auto Electrical experts.

Your one-stop auto electrical shop in Auckland. Car or truck not performing as it should? Need parts, repair, or servicing? Welcome to Simms Auto Electrical. Specialising in all things automotive electrical, we only stock the very best brands for guaranteed high quality every time. Large show room stocking alarms, vehicle lighting, Cameras, horns, fuses switches we got it all. We are also a Battery Town store, we can supply all kinds of batteries and battery master switches. As your one-stop auto electrical shop we can also diagnose different types of vehicles, using the latest diagnostic equipment and techniques. with a fleet of service vans we can also attend anywhere in Auckland and surrounds.

25/10/2026

Flickering trailer lights aren’t just frustrating—they can point to a fault that compromises safety and delays the job. This practical guide covers the common causes, from poor earths and damaged wiring to faulty plugs and connectors, and how to narrow down the problem quickly. Find out what to check first and when it’s time to call in a specialist.

https://simmselectrical.co.nz/trailer-lights-flickering

23/10/2026

Truck electrical faults can bring a vehicle, fleet or delivery schedule to a standstill. Our guide covers the key electrical parts that support reliable uptime, from batteries and starters to alternators, lighting and diagnostic systems. It’s practical guidance for choosing dependable components and keeping heavy vehicles working when downtime isn’t an option.

https://simmselectrical.co.nz/truck-electrical-parts-guide

21/10/2026

A flat battery is not always a battery problem—parasitic drain can quietly pull power from your vehicle while it’s parked. Our guide explains how to identify the source, test the electrical system safely and avoid unnecessary parts replacement. It’s a practical starting point for vehicle owners, fleet managers and operators who need to minimise downtime and keep vehicles ready for work.

https://simmselectrical.co.nz/how-to-locate-parasitic-drain

19/10/2026

Choosing between a lithium and AGM battery isn’t just about price—it depends on your vehicle, power demands and how hard it works. We break down the key differences, including performance, lifespan, charging needs and where each battery type makes sense for everyday drivers and commercial operators. Get the right information before replacing a battery and avoid costly downtime.

https://simmselectrical.co.nz/lithium-versus-agm-batteries

17/10/2026

Poor trailer lighting isn’t just a visibility issue—it can create serious safety risks and costly downtime. The right upgrades, from brighter LED lamps to better wiring and compliance checks, help keep your trailer visible and road-ready in all conditions. This practical guide covers the most worthwhile lighting improvements for safer towing, whether you’re managing a fleet or hauling gear on the weekend.

https://simmselectrical.co.nz/best-trailer-lighting-upgrades

15/10/2026

Keeping a commercial fleet secure means protecting vehicles, tools and valuable time. Our guide to the best commercial vehicle alarms in Auckland covers practical options for trucks, vans, trailers and work vehicles, with a focus on reliable coverage and minimal downtime. It also explains what fleet operators should look for when choosing alarm systems backed by dependable installation and support.

https://simmselectrical.co.nz/best-commercial-vehicle-alarms-auckland

13/10/2026

Is it a flat battery or a failing alternator? The symptoms can look similar, but knowing the difference can save time, prevent unnecessary parts replacement and get your vehicle back on the road sooner. Our guide explains the key warning signs, what to check, and when professional diagnostics are needed—especially important when vehicle downtime affects your business.

https://simmselectrical.co.nz/alternator-versus-battery-fault

11/10/2026

Fleet downtime starts with small charging system issues that are easy to miss. Our inspection guide covers the key checks for batteries, alternators, cables and connections, helping fleet managers spot faults before they become costly breakdowns. It’s a practical, no-nonsense resource for keeping commercial vehicles reliable and on the road.

https://simmselectrical.co.nz/fleet-charging-system-inspection-guide

09/10/2026

Cable corrosion can lead to hard starting, electrical faults and unexpected vehicle downtime—especially in working vehicles exposed to moisture, grime and road spray. Our latest guide explains the common causes of corrosion and practical ways to protect cables, connections and performance. A few simple checks and the right preventive steps can help keep your vehicle reliable and your operation moving.

https://simmselectrical.co.nz/how-to-prevent-cable-corrosion

07/10/2026

How often should your car or truck’s air con be regassed? There’s no fixed schedule—most systems only need attention when refrigerant is lost, often due to a leak or ageing components. Knowing the warning signs and recommended service intervals can help avoid poor cooling, costly repairs and unnecessary vehicle downtime.

https://simmselectrical.co.nz/aircon-regas-frequency

Address

70 Princes Street
Auckland
1061

Opening Hours

Monday	7am - 5pm
Tuesday	7am - 5pm
Wednesday	7am - 5pm
Thursday	7am - 5pm
Friday	7am - 5pm
Saturday	7am - 12pm

Website

https://www.simmsautoelectrical.co.nz/

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