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Autec Auto Electrical

Towbar & trailer wiring

Towbar & trailer wiring

One indicator not working, brake lights that cut out over bumps, or a trailer plug that’s corroded solid — trailer wiring takes a beating from water and road grime, and it shows.

Signs you need this

  • One trailer light works, others don’t
  • Lights work sometimes, cut out over bumps or corners
  • Trailer plug pins are corroded or bent
  • New trailer or caravan needs wiring fitted for the first time
  • Towing electric brakes that aren’t engaging properly

What we do

We check both ends of the connection — the vehicle’s towbar wiring and the trailer’s own loom — since an intermittent fault is often a corroded pin or a loose earth rather than a broken globe. New installations are wired to suit the vehicle’s existing lighting system, including LED-compatible wiring where needed.

What it costs

A straightforward plug or connector repair is a quick job. A full towbar wiring installation on a vehicle that’s never had one costs more and depends on the vehicle. We’ll estimate before starting.

What we work on

Cars · 4WDs and utes · Trailers · Boat trailers

Questions

Can you fit trailer wiring to a car that’s never had a towbar?
Yes, including wiring compatible with LED trailer lights.
Why do only some of my trailer lights work?
Often a corroded plug pin or a bad earth connection rather than a blown globe — we test both ends to find the actual cause.
Is this a quick job?
Most plug and connector repairs are — a full new installation takes a bit longer.
Do you do 7-pin and 12-pin plugs?
Yes, and we can advise which is right for your setup.
Call 09 425 7969