The electronics on your trailer are incredibly important. Make sure your trailer wiring is installed properly to the tow vehicle’s harness. At Trailer Boss we take care of all of the details including spraying the contacts with dielectric grease to prevent corrosion.
If you have a trailer with electric brakes, you understand that they rely on a small gel-cell battery to initiate stopping when the breakaway lanyard is pulled. The battery is supposed to charge whenever the truck engine is running. However, occasionally things can go wrong. It is good planning to check these batteries before starting out. If you have stored the trailer for a long time the juice can be sapped. Faulty wiring can also mean this battery is not functioning properly.
You can use a test light or voltmeter to make sure the battery is working.