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Summary: When testing trailer lights, make sure they work on both the trailer and the vehicle. Test truck trailer lights with tips from a custom car repairman in this free auto maintenance video.
Kirby Witt has been involved in the auto industry for many years. His grandfather had a Mobil Service Station for 60 years. At age 17, Kirby started his first auto body shop in South...read more
"Next we're going to check our lights. We want to make sure they're not only working on the trailer but on the vehicle pulling the trailer also. It's not just for the safety of the people pulling this vehicle, but the people behind you and all around you as well. If you have someone with you it's great. If you have them in front, we're just going to go through a basic check. We're going to check our tail lights, we're going to check our brake lights, left and turn signal, and our hazards, make everything, to make sure everything's functioning correctly. It's good to check every time because unlike your car, most people don't pull their trailer every day like you drive your car every day, and sometimes, just with things sitting around, connections can get bad, a light can get busted and you don't realize it and then the lights aren't operating correctly. So we're going to try our brake lights first. Okay, now our left turn signal, our right turn signal, and then we want to try our hazards. It looks like all our lights are working, we're ready to go get a vehicle."
eHow Article: Testing Truck Trailer Lights