Relays For Trailer Lights From Semi Truck To Fifth Wheel Camper
Printed From: the12volt.comForum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=147981
Printed Date: May 06, 2025 at 11:46 PM
Topic: Relays For Trailer Lights From Semi Truck To Fifth Wheel Camper
Posted By: tim220225
Subject: Relays For Trailer Lights From Semi Truck To Fifth Wheel Camper
Date Posted: March 30, 2024 at 5:52 PM
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.
.
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.
.