RV Wiring & Panel Repair in Jensen Beach

RV wiring is different from residential wiring in ways that matter. Every wire in your RV has been vibrating down the highway since the day it was built, and vibration loosens connections, chafes insulation, and eventually causes failures that wouldn't happen in a house. The breaker panel in an RV handles the same voltages as your home panel, but in a fraction of the space, with components exposed to humidity, heat, and road vibration. When something goes wrong in the panel or wiring, it needs someone who understands both the electrical principles and the specific challenges of mobile environments. That's been Scott Marlins' specialty across Jensen Beach for over 10 years.

Breaker Panel Service

The breaker panel is the distribution center for your RV's 120V AC system. It receives power from shore power (through the transfer switch) and distributes it to individual circuits that feed outlets, appliances, and the converter. Common panel problems include breakers that trip repeatedly, loose bus bar connections, melted wires at terminal screws, and breakers that fail to trip when they should (which is actually more dangerous than a breaker that trips too often).

We inspect panel internals for signs of overheating, which shows up as discolored wire insulation, darkened bus bars, or a burnt smell. Per NEC Article 551, all connections must be torqued to specification and wires must be properly routed without sharp bends or compression. We see a lot of panels where previous owners or unqualified technicians have added circuits without following these requirements, creating fire hazards that may not be obvious until something goes wrong.

Breaker replacement is common on older RVs. Breakers lose their ability to trip accurately over time, especially after repeated thermal cycling in Florida's heat. A breaker that's supposed to trip at 15 amps might not trip until 25 amps after 10 years of use. That means it's no longer protecting the wire on that circuit from overheating. We test breaker trip points with a calibrated load bank and replace any that are out of specification.

Circuit Tracing and Short Circuit Diagnosis

Finding a short circuit in an RV is harder than in a house because the wires are hidden behind wall panels, under flooring, and inside the ceiling. You can't just open a wall to follow a wire. We use a systematic approach: starting at the breaker panel, we disconnect the suspect circuit, test for a ground fault with a megohmmeter, then use a toner/tracer to follow the wire through the RV and locate the damage point.

The most common causes of short circuits in RVs are chafed wires where they pass through metal framing (vibration rubs through the insulation over time), rodent damage (mice love the soy-based insulation on modern wiring), water intrusion at exterior light fixtures or roof penetrations, and failed connectors at junction points. Each of these has a different repair approach, but the diagnosis method is the same.

We also trace and repair open circuits (where a wire has broken internally but the insulation looks intact). Open circuits cause intermittent failures that can be maddening to troubleshoot. One day the outlet works, the next day it doesn't. These are usually caused by a wire that's cracked internally at a stress point and only makes contact when the RV is sitting perfectly level or at a certain temperature.

Wire Replacement and Routing

When wiring needs replacement (due to heat damage, rodent damage, or water corrosion), we use the correct wire type for RV applications. That means stranded copper conductors (not solid wire) with insulation rated for the temperature range and environment. We follow the existing wire routing where possible and secure new runs with appropriate clips and grommets to prevent chafing at pass-through points.

For 12V DC circuits, wire gauge is critical. Voltage drop in a 12V system is much more significant than in a 120V system because there's less voltage to start with. A wire that's adequate for a short run might cause significant dimming or performance loss on a long run. We calculate voltage drop for every circuit and upsize wire gauge when needed to keep drop below 3% per ABYC standards (which are more stringent than NEC and are the standard most RV manufacturers follow for DC wiring).

12V DC System Repair

Your RV's 12V system powers more than you might think: interior lights, water pump, furnace fan and control board, refrigerator control board, slide-out motors, leveling jack controls, LP gas detector, smoke detector, and the coach battery disconnect relay. When the 12V system has problems, multiple things fail at once in confusing patterns.

The 12V fuse panel (usually separate from the 120V breaker panel) distributes battery power to individual circuits through blade fuses or circuit breakers. Corroded fuse holders are a common issue, especially in RVs stored near the coast. The salt air corrodes the spring contacts inside the fuse holder, creating resistance that causes voltage drop and intermittent failures. Cleaning or replacing the fuse panel contacts is a quick fix that solves a lot of mysterious 12V issues.

We also diagnose and repair the wiring between the batteries, converter, fuse panel, and individual circuits. Ground connections are a frequent problem area. RV 12V circuits ground to the chassis frame, and corrosion at the ground point creates resistance that affects every device on that circuit. Cleaning, relocating, or adding supplemental ground connections often solves intermittent 12V problems that have stumped other technicians.

Pricing

Service	Typical Cost
Circuit diagnosis and simple repair	$95 - $200
Short circuit tracing and repair	$150 - $400
Breaker replacement (per breaker)	$45 - $95
Breaker panel repair or rewiring	$300 - $750
New circuit installation	$200 - $450
Rodent damage repair (per circuit)	$150 - $350
12V fuse panel service	$95 - $250

Rodent Damage Repair

Rodent damage to RV wiring is more common than most owners realize. Mice and rats chew through wire insulation to get to the soy-based jacketing material that many manufacturers switched to in the 2010s. The damage can affect single wires or entire harnesses, and it often happens in hidden areas (behind walls, under the floor, inside the engine compartment of motorhomes) where you won't see it until something stops working.

We repair rodent-damaged wiring using the same stranded copper conductors and heat-shrink connectors used in the original construction. For areas with recurring rodent access, we recommend wire loom or split conduit to provide a physical barrier against future chewing. We can also point out entry points where rodents are getting into the RV's wiring cavities.

Related Electrical Services

• Shore Power & Transfer Switch
• Battery & Converter Repair
• Outlet & GFCI Repair

Call 772-356-0328 for a free estimate on any RV wiring or panel issue.