San Diego RV Center has been handling RV electrical repair in San Diego since 1990. Whether your lights are flickering, your battery won’t hold a charge, or your slide room stopped responding mid-trip, our technicians diagnose and fix the problem at our shop in El Cajon. We work on 12V and 120V systems, motorhome wiring, inverters, converters, and shore power connections — all backed by a 90-day warranty on parts and labor.

Why RV Electrical Problems Are Different

RV electrical systems are more complicated than a house or a car. Most rigs run two separate systems — a 12V DC system powered by house batteries for lights, slides, and water pumps, and a 120V AC system for appliances, outlets, and rooftop air conditioning. When something goes wrong, it’s rarely obvious which system is at fault or where the problem originates in the wiring. A technician who only works on cars or only on homes won’t have the full picture.

After 36 years of working on motorhomes, fifth wheels, and travel trailers, we’ve seen how quickly a small wiring issue can cascade into something more expensive if it’s misdiagnosed. That’s why we start every job with a structured electrical diagnostic before any parts are ordered or work begins.

Our RV Electrical Diagnostic Process

Accurate diagnosis is the most important part of any RV electrical repair. We test both the 12V and 120V sides of the system, check battery condition and charging circuits, inspect the converter and inverter, and trace wiring to identify shorts, corrosion, or failed connections. We use diagnostic equipment designed for RV systems, not general automotive tools.

Before we quote any repair, we tell you exactly what we found and what it will take to fix it. You can read more about our general RV repair services to get a sense of how we approach every job at the shop.

Electrical Services We Handle

• Battery systems: Testing, replacement, and charging circuit repair for house and chassis batteries
• Shore power issues: Diagnosing why your rig won’t accept power at a campground hookup, including pedestal and cord problems
• Inverter and converter repair: Fixing or replacing failed inverters and converters that affect your 120V outlets and charging
• Slide room wiring: Tracing wiring faults that cause slide rooms to fail to extend or retract
• Lighting: Interior and exterior light repair, fixture replacement, and LED upgrades
• Circuit breakers and fuse panels: Replacing tripped or failed breakers and tracking down repeated faults
• Wiring repairs: Splicing, re-routing, and replacing damaged or corroded wiring throughout the coach

If your issue involves a slide that won’t move, we often handle both the mechanical and the electrical side. See our dedicated page on RV repair services for a full picture of what we cover.

Common RV Electrical Issues We See

The most frequent calls we get involve batteries that drain overnight, outlets that work at home but not at a campground, and lights that dim or flicker under load. Shore power problems are especially common because the connection points — the cord, the inlet, and the transfer switch — all wear over time and are often overlooked during routine maintenance.

Inverter and converter failures tend to sneak up on owners. The converter charges your house batteries when you’re plugged in; the inverter converts that battery power to 120V when you’re off-grid. When either one goes, it’s easy to blame the battery. We sort out which component is actually at fault before recommending a replacement. For background on what causes these problems, our blog post on causes of RV electrical issues covers the most common culprits in detail.

The 90-Day Warranty

Every electrical repair we complete is covered by a 90-day warranty on parts and labor. If a repair we performed fails within that window, bring it back and we’ll make it right at no charge. We’ve been in El Cajon for over three decades, so we’re not going anywhere — that warranty means something here.

We also recommend pairing any major electrical work with a general maintenance check. Catching related issues early — like a corroded ground strap or an aging battery — saves money down the road. Our RV motorhome maintenance service is a good starting point if your rig hasn’t been looked over recently.

RV Electrical Repair vs. DIY

Some RV owners are comfortable replacing a fuse or swapping a battery. That’s fine. But tracing an intermittent short in a 40-foot motorhome’s wiring harness is a different kind of job. Mistakes in 120V systems can cause fires, and a misdiagnosed battery issue can leave you stranded on a trip.

If you’ve already tried the obvious fixes and the problem keeps coming back, that’s usually the point to bring it in. We’re also happy to talk through what you’ve already tried — call us at (619) 561-3531 before you drive over if you want a quick opinion. You can also learn more about why San Diego RV Center has been the go-to shop for local RV owners for 36 years.

Serving San Diego County

Our shop is at 9398 Bond Avenue in El Cajon, CA 92021. We’re easy to reach from Santee, La Mesa, Lakeside, Spring Valley, and the broader San Diego area. Most customers drop their rig off in the morning and we give them a diagnostic report the same day or next morning, depending on the scope of work.

If you’re not sure whether your problem falls under electrical or something else — roof leaks near wiring, for example — we’ll sort that out during the diagnostic. See our service areas page for a full list of communities we serve across San Diego County.

Frequently Asked Questions

How do I know if my RV has an electrical problem?

Common signs include lights that flicker or won’t turn on, outlets that don’t work, batteries that drain faster than normal, a converter fan that runs constantly, or appliances that trip the breaker. Any of these symptoms point to an electrical issue worth diagnosing before it gets worse.

Do you work on both motorhomes and towable RVs?

Yes. We work on Class A, B, and C motorhomes as well as fifth wheels and travel trailers. The electrical systems differ by rig type, but our technicians are experienced across all of them.

How long does RV electrical repair take?

Simple repairs like a battery replacement or a blown breaker can be done the same day. More involved jobs — tracing a wiring fault or replacing a converter — typically take one to two days. We’ll give you a realistic time estimate after the diagnostic.

Is there a charge for the diagnostic?

We charge a diagnostic fee that gets applied toward the repair cost if you proceed with the work. Call us at (619) 561-3531 or visit our RV repair FAQs page for more details on how we handle estimates and approvals.