Whether you’re hauling cargo or just making a weekend getaway with your caravan, electrical issues in your trailer can put a serious damper on your plans. From dead batteries to flickering brake lights, trailer wiring systems can be a little finicky, especially if they're not maintained regularly. Here are a few common trailer electrical problems to look out for and how to tackle them. When you need trailer electrical repairs in Carson City, NV, contact Presto Auto Electric.

Poor Electrical Connections

Loose or corroded connections are some of the most common culprits behind trailer electrical issues. Over time, moisture, dirt, and road grime can work their way into connectors and terminals, interrupting the flow of electricity. This can cause anything from non-working tail lights to intermittent brake signal problems. Make it a habit to check plug connections for corrosion and clean them with electrical contact cleaner. Securing any loose wires and using dielectric grease can also help prevent future trouble.

Caravan Fridge Charge Circuit Failures

If your caravan fridge won’t stay cold while you’re driving, the issue may lie in the 12V charge circuit. This circuit is supposed to power the fridge from your vehicle’s alternator, but if there's a blown fuse, a damaged relay, or a poor connection, the system can fail to deliver power. It’s a good idea to test the voltage at the fridge connection when the engine is running; if you're not seeing power, the problem is likely in the charge circuit.

Troubleshooting Electric Trailer Brakes

Electric brakes are critical for safety, and when they’re not working properly, it’s a big red flag. Common problems include faulty wiring to the brake magnets, worn-out brake controllers, or a blown fuse. If you notice delayed braking or hear strange sounds when stopping, it's worth checking the brake wiring and testing the magnets for continuity. Professional inspection is often the safest route for brake system issues.

Servicing the Battery Isolator

Battery isolators are designed to prevent your trailer’s battery from draining your tow vehicle’s battery, but like all components, they can fail over time. If your trailer’s battery isn’t charging as it should or is completely dead, a faulty isolator may be to blame. Make sure the isolator is properly connected and receiving power when the engine is on. Replacing a worn isolator is usually a straightforward fix and can save you from future headaches.

Trailer Wiring and Repair in Carson City

At Presto Auto Electric, we can assist with trailer electrical problems, including poor connections and caravan fridge charge circuit issues. We can also repair electric trailer brakes or service battery isolators. We can even install LED lighting on your trailer! Call us at (775) 430-4546  to schedule an appointment.