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Relays For Trailer Lights From Semi Truck To Fifth Wheel Camper

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Member - Posts: 1
Member spacespace
Joined: March 30, 2024
Location: Alabama, United States
Posted: March 30, 2024 at 5:52 PM / IP Logged Link to Post Post Reply Quote tim220225
New subscriber here. I have a 1990 Peterbilt that I am using to tow a fifth wheel camper. The truck has the standard 7 round pin trailer light plug with seperate brake and turn signal circuits. The trailer has the standard RV style 7 flat pin trailer plug and the brake and turn signals are combined on one filament.
I have tried the two relay setup for each side. Brakes work fine, turn signals work fine. Problem is when the brakes are applied and the left or right turn signal is on the trailer turn signal lights flash off sequence from the truck.
Suggestions Please.
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