Battery Drain & Electrical Diagnostics Calgary SE & SW

Electrical problems can be the most frustrating issues to deal with—because they’re often intermittent. A weak connection, failing sensor, bad ground, or battery drain can cause random warning lights, no-starts, flickering lights, or features that work “sometimes.”

At Heritage AutoPro, we provide professional auto electrical diagnostics and repair in Calgary SE & SW. We don’t just replace parts based on symptoms—we test, confirm the root cause, and explain the most cost-effective repair options.

Common Electrical Symptoms We Diagnose

If you’re seeing any of these, an electrical diagnosis is the right next step:

• Battery keeps dying overnight or after a few days (parasitic draw)

• No crank / intermittent crank / single click when starting

• Battery light / charging system warning on dash

• Flickering headlights or dimming interior lights

• Power windows, locks, radio, or screens cutting out

• Random warning lights (ABS, traction, airbag, steering, etc.)

• Blown fuses repeatedly

• Burning smell, melted connector, or hot battery cables

• Remote start / aftermarket accessory issues

• “Low voltage” codes or multiple unrelated codes at once

Tip: Multiple warning lights at the same time often point to a voltage/charging issue, weak battery, or poor ground—so testing matters.

What We Test During Electrical Diagnostics

Depending on the concern, our process may include:

Battery & Starting/Charging Tests

• Battery health testing (capacity, state of health, reserve)

• Alternator output and charging control testing

• Starter performance and voltage drop testing during crank

• Battery terminals, cables, and grounds inspection

Parasitic Drain Testing (Battery Drain)

• Key-off current draw test

• Circuit isolation (fuse-by-fuse testing when required)

• Identifying modules/circuits staying awake (stuck relays, lights, modules, accessories)

Wiring & Circuit Testing

• Voltage drop testing on power and ground circuits

• Continuity checks and connector/pin inspection

• Fuse/relay testing and load testing

• Repair of damaged wiring, corrosion, or poor connections

Scan Data + Module Communication (when applicable)

• Reading system codes and live data (engine/body/ABS where supported)

• Checking charging strategy on computer-controlled systems

• Verifying network communication issues when symptoms point to modules

Result: You get an answer to what failed, why it failed, and the best repair path—not a guess.

Electrical Services We Offer

• Electrical system diagnosis and repair

• Battery testing and replacement

• Alternator replacement and charging system repair

• Starter replacement and no-start diagnostics

• Battery cable, terminal, and ground repairs

• Parasitic draw (battery drain) diagnosis

• Wiring and connector repairs

• Fuse and relay diagnosis

• Electrical warning light troubleshooting related to voltage/faults

Why Proper Electrical Diagnosis Saves Money

Electrical issues can mimic mechanical problems (misfires, stalling, sensor faults, transmission messages, ABS lights). Testing first helps you:

• Avoid unnecessary part swaps

• Fix the issue once (instead of chasing symptoms)

• Prevent repeat dead batteries and breakdowns

• Protect expensive components from low-voltage damage

What You Can Expect at Heritage AutoPro

• Clear explanation in plain language

• Honest recommendations (urgent vs can-wait)

• Quality OEM-equivalent parts when replacements are needed

• Warranty-backed workmanship

• Service for most makes and models (including imports)

Quick Preventative Tips

• Keep battery terminals clean and tight

• Replace weak batteries before winter (cold exposes weak capacity)

• Don’t ignore flickering lights or repeated jump-starts

• If you add accessories (remote start, dash cam), ensure proper wiring and fuse protection