Peats Ferry Road in Hornsby, Sydney’s upper north shore

Hornsby and the Hills

Photo: Kgbo, CC BY-SA 4.0, via Wikimedia Commons

From the railway hub of Hornsby across to the family suburbs of Castle Hill and Baulkham Hills, this is commuter and family car country, with bushland on almost every edge. Typical work includes batteries, towing setups, camera and sensor fitting, and wiring chewed by wildlife.

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Hornsby and the Hills at a glance

  • Council: Hornsby / The Hills Shire
  • Suburbs: Hornsby, Thornleigh, Castle Hill, Baulkham Hills
  • Main routes: Pacific Highway, M1 Pacific Motorway, Pennant Hills Road, M2 Hills Motorway, Old Northern Road, Windsor Road, Showground Road
  • Typical work: battery and charging faults, towbar and caravan wiring, rodent damage repairs, reversing cameras and sensors, air conditioning, light commercial accessory wiring

Suburbs in Hornsby and the Hills

Hornsby is a transport hub where the North Shore and Northern lines meet, close to the southern end of the M1, so commuter cars and holiday towing both feature. Thornleigh mixes hillside homes with an industrial pocket off Pennant Hills Road. Further west, Castle Hill and Baulkham Hills are large family suburbs built around Old Northern Road, Windsor Road and the M2, with bushy reserves like Bidjigal Reserve close by. Bush means rodents, big blocks mean trailers, and long commutes mean hard-working batteries.

Hornsby · Thornleigh · Castle Hill · Baulkham Hills

Common auto electrical jobs in Hornsby and the Hills

The jobs here follow the lifestyle: family SUVs, weekend towing, long motorway commutes and cars parked next to bushland.

Rodent and possum damage

Homes backing onto Lane Cove National Park, Bidjigal Reserve and other bush corridors see more chewed wiring than most of Sydney. Rats and mice nest in warm engine bays and some modern wiring insulation seems to attract them. The result can be warning lights, dead sensors or a car that will not start. Look for droppings, nesting material or chewed foam under the bonnet. Our guide to rodent damage to car wiring explains prevention and repair.

Get it done: get a quoteDo it yourself: shop wiring loom tapes

Towbar wiring for trailers and caravans

Big blocks and weekend getaways mean plenty of box trailers, camper trailers and caravans in the Hills. Many newer cars need a proper towbar wiring harness rather than tapping into the tail lights, because the lighting circuits are monitored by the car's computer. Getting it right avoids error messages and blown modules. Read do I need a towbar wiring harness before you buy one.

Get it done: get a quoteDo it yourself: shop towbar wiring harnesses

Batteries for stop-start commutes

Pennant Hills Road, Windsor Road and the M2 at peak hour are hard on cars with idle stop-start systems. These cars use AGM or EFB batteries, and fitting a cheaper standard battery often leads to early failure and stop-start that stops working. Some also need the new battery registered to the car. Check what your car came with, and see car battery types explained for the differences.

Get it done: get a quoteDo it yourself: shop EFB batteries

Cameras and parking sensors

Steep driveways, kids' bikes on the footpath and large SUVs make reversing cameras and sensors one of the most requested fit-outs in the area. Older family cars can be upgraded with a camera on the number plate and a screen in the mirror or dash. Rear parking sensors are a simple add-on that suit cars with low rear windows. Both run off the reverse light circuit on most vehicles.

Get it done: get a quoteDo it yourself: shop parking sensors

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