# Boat Electrical Repair Long Beach | Fault-Finding at Your Slip | Long Beach Marine Electric

> Dead circuits, flickering panels or intermittent faults? Dockside boat electrical repair in Long Beach with meter-based diagnosis. Free estimate. Call now.

URL: https://longbeachmarineelectric.com/boat-electrical-repair/

Repair · Same-day callback

# Dockside Boat Electrical Repair in Long Beach

Dead circuits, flickering lights, a panel that works one day and not the next. A dockside electrician finds the fault with a meter and fixes it at your slip.

[Call (562) 374-7233](tel:+15623747233) [Get a Free Estimate](/contact/)

-   ABYC E-11 AC & DC systems
-   Voltage-drop testing under load
-   3% critical / 10% non-critical drop limits
-   Tinned UL 1426 marine cable
-   Adhesive-lined heat-shrink connections
-   Free estimate within 24 hours

Last updated: October 6, 2026

[Long Beach Marine Electric](/) connects boat owners with licensed, insured marine electricians for boat electrical repair at the slip: dead circuits, breakers that trip, gauges that read wrong, pumps and lights that work intermittently, and the burning smell nobody can trace. Repair starts with diagnosis. A voltage-drop test under load and a methodical circuit trace find the actual fault, whether it's a corroded crimp, a failed switch or a chafed wire, so you pay for one fix instead of a box of swapped parts.

## What happens on the first visit

1.  A walk-through of the symptom with you: when it happens, what else is running, and whether it changed after recent work. Intermittent faults are found faster with a good history.
2.  Battery state and charging check first, because a weak bank causes symptoms that look like wiring faults.
3.  Voltage-drop measurement on the failing circuit under load, from the source through the breaker or fuse to the device and back on the negative side.
4.  Inspection of the connections the drop test points to: terminals, bus bars, crimps, switches and the backs of panels, where salt air does most of its damage.
5.  A written finding naming the faulty part or run, and a fixed price for the repair before work starts.

## Why boat wiring fails in Long Beach's salt air

Most boat electrical faults aren't failed devices. They're resistance at a connection. Salt-laden marine-layer air works into crimps, terminal screws and bus bars, copper oxidizes, and resistance climbs. A connection that measured near zero when it was made can drop a volt or more under load a few seasons later. The device on the end of that circuit then runs dim, runs hot, or quits whenever the load peaks.

ABYC E-11 sets the targets that matter here: no more than **3% voltage drop on critical circuits** such as navigation lights and bilge pumps, and no more than **10% on non-critical circuits**. On a 12-volt boat, 3% is about a third of a volt. That's why a voltage-drop test under load, not a continuity beep, is the test that finds real faults.

## The usual suspects on older boats

-   **Untinned automotive wire.** Bare copper strands blacken inside the jacket, sometimes a foot or more from the visible end, so cutting back a few inches doesn't reach clean copper.
-   **Crimps without heat-shrink.** Water wicks into the barrel and corrodes the joint from the inside.
-   **Overloaded circuits.** Accessories added over the years to one breaker, with the wire never upsized.
-   **Chafe points.** Wire runs through bulkheads and over engine brackets without grommets or support, where vibration wears through the insulation.
-   **Ground and negative-bus faults.** A single bad negative connection can make several unrelated circuits misbehave at once.

## When a repair becomes a rewire

On a 30- to 40-year-old boat, fixing one connection often exposes blackened wire behind it. The right call is to stop and price the choice: repair that run with tinned UL 1426 cable and sealed connections, or re-run the circuit. Electricians booked through Long Beach Marine Electric stop and call you before a job grows. If a pattern of failed runs shows up, a planned [boat rewiring](/boat-rewiring/) of the affected circuits costs less than chasing faults one by one.

A burning smell, melted insulation or a breaker that trips again immediately after reset is a fire risk. In BoatUS insurance claims, engine electrical faults cause about 20% of boat fires and other DC electrical faults another 15%. Leave that circuit off and call.

## Insurance, warranty and who pays

Electrical repair is usually owner-paid. Insurance generally covers sudden damage, such as a fire, but not wear and corrosion. Diagnosis is billed hourly, typically $140–$200/hr in Long Beach with a one- to two-hour minimum, because nobody can know in advance how long a hidden fault takes to find. Once the fault is found, you approve a fixed price for the repair. See the [marine electrician cost guide](/guide/marine-electrician-cost/) for typical totals.

## What's included

-   Symptom history and battery check
-   Voltage-drop testing under load
-   Positive and negative circuit tracing
-   Connection, bus bar and switch inspection
-   Tinned-wire splice and connection repair
-   Breaker and fuse sizing check
-   Written findings and fixed repair price
-   Re-test of the repaired circuit

## DIY vs cheap fix vs proper electrical repair

DIY

Cheap operator

Proper marine work

Diagnosis

Swap parts until it works

Replace the obvious part

Voltage-drop test under load, then fix

Wire

Hardware-store copper

Automotive, untinned

Tinned UL 1426 marine cable

Connections

Twist-on nuts and tape

Bare crimps

Ratcheting crimps + adhesive heat-shrink

Circuit protection

Often skipped

Sized to the load

Sized to the wire, per ABYC E-11

Result

Fault returns

Fault moves

Drop within 3% / 10% limits

## Related resources

-   [How Much Does a Marine Electrician Cost in Long Beach? (2026)](/guide/marine-electrician-cost/)
-   [DIY Boat Wiring vs Hiring a Marine Electrician: Where to Draw the Line](/guide/diy-boat-wiring-vs-marine-electrician/)

## Sources

-   [Wiring Harness News: ABYC E-11 voltage-drop limits](https://wiringharnessnews.com/electrical-standards-for-marine-wiring/)
-   [BoatUS claims data via Quimby's Cruising Guide](https://quimbyscruisingguide.com/how-boat-fires-happen/)
-   [Trawler Forum: 2026 marine electrician labor rates](https://www.trawlerforum.com/threads/labor-rate-for-high-quality-electrical-work-by-abyc-certified-marine-electrician.78378/)

Smell burning?

Turn that circuit off, disconnect shore power if safe, and call.

[(562) 374-7233](tel:+15623747233)

Mon–Sat 7am–6pm · Free estimate within 24 hours

Standards applied

-   ABYC E-11 (AC & DC systems)
-   3% / 10% voltage-drop limits
-   UL 1426 marine cable
-   SAE J1171 ignition protection

[Estimate your cost](/tools/marine-electrical-cost-estimator/)

How it works

## How boat electrical repair works

1.  01
    
    ### Describe the fault
    
    Call or send the form with the boat, the marina and what's failing. You get a callback the same day.
    
2.  02
    
    ### Test, don't guess
    
    Battery check, then voltage-drop testing under load to pinpoint the bad connection or run.
    
3.  03
    
    ### Fixed price, then repair
    
    You approve a written price. Repairs use tinned marine wire and sealed connections.
    
4.  04
    
    ### Re-test under load
    
    The circuit is re-measured under load to confirm the drop is within ABYC E-11 limits.
    

Get boat electrical repair at your slip today

Same-day callback. Written price before any work.

[Call (562) 374-7233](tel:+15623747233) [Get a Free Estimate](/contact/)

Straight answers

## Boat Electrical Repair questions

### Why does my boat's electrical problem come and go?

Intermittent faults are almost always a high-resistance connection that changes with temperature, vibration or load: a corroded crimp, a loose terminal or a failing switch. They're found by voltage-drop testing the circuit under load, ideally while the fault is happening, so note when it occurs before the electrician arrives.

### Can a household electrician fix my boat wiring?

Usually not well. Boats run 12- or 24-volt DC systems with different standards (ABYC E-11), materials (tinned marine cable) and failure modes than a house. Shore power work also involves leakage and galvanic issues a house electrician doesn't see. A marine electrician is the right trade.

### How long does a typical electrical repair take?

A single fault found and fixed at the slip often takes one to three hours. Faults hidden behind panels, headliners or in engine compartments take longer. The diagnosis is billed hourly, and the repair gets a fixed price once the fault is found.

### Is a burning smell from my panel an emergency?

Yes. Turn off the affected breaker or the battery switch and disconnect shore power if it's safe to do so, then call. A hot connection or melting insulation is a fire risk. Electrical faults cause a large share of boat fires in BoatUS claims data.

### Who does the work, and how do I know they’re qualified?

Long Beach Marine Electric is a free service that connects you with an independent, licensed and insured marine electrician who holds the American Boat & Yacht Council (ABYC) Marine Electrical Certification. Ask your electrician for proof of license and insurance before work starts.

## Related services

[Shore Power RepairPedestal keeps tripping, burnt inlet, no AC at the panel. Covers 30A and 50A inlets, cords, ELCI breakers and leakage faults.](/shore-power-repair/) [Marine Battery InstallationBatteries keep dying, or the charger won't charge on shore power? Covers battery banks, chargers, switches and parasitic-draw testing.](/marine-battery-installation/) [Boat RewiringAging automotive wire replaced with tinned marine cable, new AC/DC panels and labeled circuits, built to ABYC E-11.](/boat-rewiring/)

Get the fault found, not guessed at

[Call (562) 374-7233](tel:+15623747233) [Get a Free Estimate](/contact/)