How To Wire Trailer Lights. To fix broken trailer lights, begin by checking the ground. So here I have an older trailer which needed some work, along with re-wiring the lights.
I've read thru many posts here and realize it's not as simple as it may seem. How many amps do electric trailer brakes draw? Most trailers have three circuits that you'll connect to your vehicle.
Today there is no reason to ever cut, strip, or harm in anyway the original wiring harness on most cars.
Wiring to these lights and brakes can become cracked and brittle and need replacement.
Always be extra aware of everything. Aftermarket plug and play wiring harnesses are available that allow you to simply unplug the connector at the car's taillight assembly and plug in the. One operates the taillights, one runs the left brake light and the last one runs the right brake light.