Electrical Diagnostics and Fault Finding

Electrical diagnostics traces faults in body, accessory, and upfit wiring using voltage drop testing, circuit isolation, and load testing. The objective is to find the actual cause rather than replacing components until the symptom disappears.

Symptoms

Signs you need this work

Intermittent lighting or accessory failure
Battery drain when parked overnight
Equipment slow or weak under load
Blown fuses that keep recurring
Corroded connectors or damaged harness sections

Testing under the fault conditions

A circuit that reads twelve volts with no load can still fail completely under a real one. Voltage drop testing under load finds the resistance that a static test misses, and that is where most fleet electrical faults live.

Recurring blown fuses are a message, not a nuisance. Something is drawing more than the circuit was designed for, and replacing the fuse repeatedly eventually turns a fault into a fire.

Voltage drop testing under actual load
Circuit isolation to locate parasitic drain
Harness inspection at flex and chafe points
Connector and ground point cleaning and repair
Load testing of batteries and charging output
Documented findings before any repair authorization

Pricing

What this typically costs

Ballpark range

$285 to $5,000 and up

1 to 20 labor hours

Commercial damage varies widely, so this is a range rather than a quote. The number for your vehicle comes from assessing the actual damage.

Collision estimates for insurance claim walk-ins carry no charge. Systems estimates are $150 and diagnostics are $285 per hour, both credited against an authorized repair.

See the full rate card for labor rates, materials, parts markup and deposit policy.

FAQ