Thanks for the help all; I'm doing a search, but cannot find specifically what I'm looking for. coming out of the circuit board is. When the fuse is blown it does not allow the circuit to complete. crossed over ihave2 hot green wires can u give me an ideal 2 get ,brake reverse turn signal and running lights 2008 Chevy Silverado 1500 I have tried a trailer with LED lights and 1 with regular bulbs. Nov 23 2019, 9:15pm. 2008 Chev 2500 Silverado LTZ diesel. Troubleshooting Trailer Wiring on 2008 Chevy Silverado 1500 Question: the taillight wires. When I first got the truck the trailer interior lights worked and now they don't . But, when I do not have a trailer hooked up and I turn on my left turn signal my 4 ways come on. It has gotten worse over the last month or so. If all else fails and you're finding badly corroded parts, you can buy a new wire harness for about $20. A 7x16 enclosed that has the round connector. Trailer Lights Not Working Solution: Replace the trailer light wiring How to wire a new trailer light system. As the rear lights are not connected, they do not illuminate. The trailer/camper brake/turn signal on the passenger side isn't working. My silverado blew the fuse for the trailer running lights in this under hood fuse block. At first I could just hit the 4 way button on for a second and the left turn signal would work fine. Tapped into the wire above the fuel tank with a test light and had nothing. With the wiring connected, whether stepping on the brake pedal or squeezing the lever on the ITBC controller I get no output and brakes don't engage. I am currently looking for any other suggestions. The trailer wiring isn't the problem. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. They fuse the trailer running lights seperate from the trucks, so if you have a bad connection or ground the connector out, it will blow the trailer running light ⦠Enclosed trailer lights not working⦠A new harness includes the ⦠Enclosed trailer lights not working. Trailer Lights Not Working when Connected to 2008 Chevy Express 2500 w/Factory Tow Package Recommended Wiring For 7-way & 4-Way Flat Trailer Connector On 2014 Honda Pilot Replacement 7-Way and 4-Way for 2003 GMC Sierra With Factory Tow Package All outside lights ok, but inside the trailer - ⦠The truck is not throwing any codes, simply the trailer brakes are not putting out anything. I recently had a 2014 silverado and pulled all three trailers in the last couple months and all the lights ⦠The Causes Why Tail Lights Not Working. We did check fuses. My best friend's 2004 2500 with factory trailer wiring has the following symptoms. 2002 Chevy Silverado Tow Package Turn Signal Circuits Work But Not Brake Light Circuit What Connector is Needed For 2009 Chevy Silverado With Trailer Towing Wiring To The Bumper Replacement 7-Way Trailer Connector for a 2003 Chevy Silverado Don't hesitate to replace the entire wiring system if it's badly corroded. Jun 23 2013, 4:55pm. The truck's running lights will work, but the trailer won't if the fuse is blown. Family Handyman. As if the trailer is not connected. I have three trailers. I have a 2012 Silverado that I use to pull an enclosed trailer. Have current on both side of the fuse under the hood. Enclosed trailer lights not working. All trailer lights work no problem just the ⦠Both trailers react the same. I will check the ground for the trailer lights. Trailer lights not working. 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