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Why does your trailer lights go out when you hit the brakes on your f 150?
Wiki User
∙ 13y ago
You have a grounding problem at the trailer. The white wire is the ground on trailer wiring. The taillights are brown, the signals and stops are yellow and green. Sometimes the white wire will loose its continuity with the truck, causing the lights to black out. It could also be a wiring issue with the trailer itself, but most likely its the ground giving you feedback and causing the blackout.
run a wire from the ground contact on your plug back to a spot on the tongue and secure the end of the wire to the trailer at that point. Do not rely on the contact of the trailer with the ball hitch to establish a ground.
Wiki User
∙ 13y ago
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When lights are on and you hit the brakes both lights go out?
no
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Cause of BMW 525i brake light circuit warning?
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