--- title: "Connector and Plug Repair Morris County NJ | 4 Pin and 7 Pin Trailer Plugs" description: "Trailer connector problems? 4 pin and 7 pin plug repair in Morris County NJ. Mobile service. 30+ years experience. Call 973-651-1045." lang: en json-ld: | { "@context": "https://schema.org", "@type": "Service", "serviceType": "Connector and Plug Repair", "provider": { "@type": "LocalBusiness", "name": "Keep Them Rolling Trailer Repair", "telephone": "973-651-1045", "email": "Keepthemrollingtrailerrepair@gmail.com", "address": { "@type": "PostalAddress", "addressLocality": "Morris County", "addressRegion": "NJ", "addressCountry": "US" } }, "areaServed": [ { "@type": "AdministrativeArea", "name": "Morris County, NJ" }, { "@type": "AdministrativeArea", "name": "Sussex County, NJ" }, { "@type": "AdministrativeArea", "name": "Warren County, NJ" }, { "@type": "AdministrativeArea", "name": "Hunterdon County, NJ" } ] } --- [![Keep Them Rolling Trailer Repair logo](/assets/logo-v9jHZR-C.webp)](/) [Home](/)[Services](/services)[About Us](/about)[Contact](/contact) [Call 973-651-1045](tel:9736511045) [Home](/)[Services](/services)[About Us](/about)[Contact](/contact)[Call 973-651-1045](tel:9736511045) ![Close up of a 7 pin trailer connector being repaired or replaced](/assets/hero-connector-repair-BeRpcKfW.jpg) [Home](/)/ [Electrical and Lighting Services](/electrical-and-lighting-services)/ Connector and Plug Repair # Connector and Plug Repair in Morris County NJ — Get a Solid Connection Between Your Truck and Trailer A bad connector means no lights, no brakes, no signal. We repair and replace 4 pin and 7 pin connectors on location. [Call Now 973-651-1045](tel:9736511045)[Get Free Estimate](/contact) 30+ Years Experience Family Owned & Operated Mobile Service to Your Door Only High Quality Parts The connector between your truck and trailer is the single most important electrical connection on your rig. When it fails, your lights go dark and your electric brakes stop working. A corroded, bent, or broken connector turns a safe towing setup into a hazard. Keep Them Rolling Trailer Repair provides mobile connector and plug repair across Morris County NJ. We fix or replace your connectors on location and make sure every pin carries a clean signal. ## When You Need Connector and Plug Repair If your trailer lights work intermittently, especially when you hit a bump or go around a corner, your connector probably has a bad contact. Corroded pins are the most common problem we see. Road spray, rain, and puddles push moisture into the connector and eat away at the metal contacts over time. Melted connectors happen when a short circuit sends too much current through one pin. A cracked or broken housing lets water in and accelerates corrosion. If you need to upgrade from a 4 pin to a 7 pin connector for electric brakes or auxiliary power, that is a job we handle regularly. A bad connector often damages lights too. We offer [trailer light repair alongside connector work](/light-repair-and-led-light-upgrades) so everything works when we leave. ## Our Connector and Plug Repair Process We inspect both the trailer side connector and the truck side receptacle. Corrosion on either side causes problems. We clean corroded pins using proper contact cleaner and abrasives when a full replacement is not needed. If the connector is too damaged to repair, we install a new one and wire it properly to all circuits. We test every circuit through the new connector to confirm solid contact. We apply dielectric grease to protect against future corrosion and install a weatherproof dust cap to keep moisture out between uses. If you are upgrading from a 4 pin to a 7 pin, we run the additional wiring and make sure everything is properly fused. If a new connector does not fix the problem, we move to [diagnostic testing for trailer electrical faults](/electrical-diagnostics) to find the real issue. ## Connector Repair Cost in Morris County Connector repair costs depend on the type and extent of the work. Cleaning and restoring a corroded connector is an affordable fix. A full 4 pin connector replacement is a straightforward job. A 7 pin connector replacement costs a bit more because of the additional circuits. Upgrading from 4 pin to 7 pin involves running new wires and costs more than a simple replacement. If the truck side receptacle also needs work, we factor that into the quote. We always give you the price upfront. Fleet customers with 3 or more trailers receive a 10% discount. ## Why Choose Keep Them Rolling We have been repairing trailer connectors for over 30 years. We know the difference between a quick fix that fails next month and a proper repair that lasts for years. This is a family owned business. Our mobile service comes to your location. We use quality connectors with corrosion resistant contacts and we protect every connection with dielectric grease. We are open 7 days a week, 7AM to 7PM. We work on everything from small utility trailers to full size commercial rigs. A solid connection keeps you safe on the road. Call 973-651-1045 for mobile connector and plug repair anywhere in Morris County and the surrounding areas. [973-651-1045](tel:9736511045) [Call Now](tel:9736511045)[Get Free Estimate](/contact) Open 7 Days a Week, 7AM to 7PM Connectors are the starting point. See [our full electrical service options](/electrical-and-lighting-services) for the complete picture. Visit our full [trailer repair services in Morris County NJ](/) to see everything we offer. ### Keep Them Rolling Trailer Repair - [973-651-1045](tel:9736511045) - [Keepthemrollingtrailerrepair@gmail.com](mailto:Keepthemrollingtrailerrepair@gmail.com) - 7AM–7PM, Monday–Sunday #### Quick Links - [Home](/) - [Services](/services) - [About Us](/about) - [Contact](/contact) - [Mobile Trailer Repair](/mobile-trailer-repair-and-roadside-service) #### Our Services - [Brakes and Suspension](/brake-and-suspension-services) - [Electrical and Lighting](/electrical-and-lighting-services) - [Structural and Welding](/structural-and-welding-services) - [Hydraulics](/hydraulic-services) - [Doors, Panels and Enclosures](/door-panel-and-enclosure-services) - [Wheels, Tires and Alignment](/wheel-tire-and-alignment-services) - [Couplers, Hitches and Towing](/coupler-hitch-and-towing-components) - [Inspections and Maintenance](/inspection-and-maintenance-services) #### Service Areas [Morris County](/trailer-repair-morris-county-nj) [Sussex County](/trailer-repair-sussex-county-nj) [Warren County](/trailer-repair-warren-county-nj) [Hunterdon County](/trailer-repair-hunterdon-county-nj) [Facebook](#)[Google](#) © 2026 Keep Them Rolling Trailer Repair. 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