Trailer lights are one of the most common reasons people end up frustrated, delayed, or pulled over on Tasmanian roads. We see this issue weekly — often right before a trip, late in the afternoon, or just after a trailer has been sitting unused for months.
The most common causes are surprisingly simple. Corrosion inside the trailer plug is the biggest culprit, especially in Hobart’s coastal conditions. Even when lights look fine from the outside, moisture can creep into wiring joins or light housings and quietly cause failure. Another common issue is a poor earth connection — a single loose or corroded earth wire can stop everything from working properly.
If your trailer lights aren’t working, there are a few safe checks you can do before towing any further. Plug the trailer into another vehicle to rule out the car. Look inside the plug for green or white corrosion. Check that the earth wire is securely connected to bare metal. If lights flicker or work intermittently, that’s a warning sign — not a fix.
What we see people get wrong is continuing to tow once the problem “sort of works”. Tasmanian law requires working trailer lights, and intermittent faults are often worse at night or in wet weather. This is how people end up stranded or fined.
If basic checks don’t solve the issue, it’s time to stop guessing. Electrical faults usually get worse, not better, and patch repairs often fail quickly.
Because we carry common plugs, wiring, and light assemblies in stock and repair trailers in-house, we can usually diagnose and fix trailer light issues the same day during business hours (Monday to Friday, 8:30–5). Whether you want a proper repair or quality parts and advice to fix it yourself, we can help.
If you’re unsure, bring the trailer in before your next tow. It’s a small issue that can cause big problems if ignored.
