High-Voltage Cable Inspection and Repair in Sacramento, CA
The orange cables in your hybrid or EV carry hundreds of volts. Damage to them — from age, chafing, or rodents — is one of the few genuinely dangerous problems a car can have, and one of the most misdiagnosed.
Warning Signs of High-Voltage Cable Problems
- Isolation or ground-fault codes (the car detects HV leaking to the chassis)
- “Check Hybrid System” after rain or a car wash
- Visible damage to orange cable insulation — rodent chewing is common
- Intermittent no-start or random hybrid-system warnings
Why It Happens
Cable insulation ages, connectors corrode, and rodents love the engine bay. An isolation fault means high voltage is finding a path it shouldn’t — the car protects you by shutting the system down, but finding the exact spot takes proper insulation-resistance testing, not guesswork.
Your Options
Depending on where the fault is, the fix ranges from a connector repair to a cable replacement. We test first, then quote firm — replacing parts until the light goes out is not how we work, and with HV systems it’s not safe either.
Our Process
- Insulation-resistance and continuity testing across the HV system — from $99
- Pinpoint the fault location and severity
- Firm quote; repair with proper HV safety procedures
- Retest and verify isolation before the car goes back on the road
High-voltage cable faults often show up during our EV battery diagnostics or a full hybrid system scan — from $99.
Our Warranty
Every repair at AT Automotive is backed by a 12-month / 12,000-mile warranty on parts and labor. If something we fixed fails within that window, bring it back and we’ll make it right.
Get HV Faults Found Properly
Call (916) 957-6884 or use our contact form. AT Automotive, 8561 Weyand Ave, Sacramento. Mon–Fri 10am–5pm.