A no-start in January at the Ridley's parking lot is no fun. Neither is dying on I-84 because the alternator finally quit. Most charging and starting problems give warning signs before they leave you stranded — slow cranks on a cold morning, a battery light that flickers on the highway, headlights that dim at idle. Our alternator and starter repair bay in Jerome tests the whole system so you replace the part that's actually bad.
What our charging and starting service covers
- Alternator replacement — cars, trucks, diesels, semis, and RVs.
- Starter replacement, including gear-reduction starters on diesel trucks.
- Charging system diagnostics — alternator output, voltage drop, parasitic draw.
- Battery testing, replacement, and dual-battery installation.
- Battery cables, terminals, and ground straps.
- High-output alternator upgrades for plow trucks, work trucks, and fleets.
- 24-volt systems on heavy-duty and commercial equipment.
- Wiring repair tied to the starting circuit — ignition switches, relays, solenoids.
Magic Valley winters punish batteries and starters
Cold mornings in Jerome, Wendell, and Gooding pull every amp a tired battery has left. A starter that worked fine in October will groan in January, and a weak alternator that limped through summer won't keep up once headlights and heated seats come on. If your truck is slow to crank on cold mornings or your battery light flickers, get it tested before it leaves you sitting.
Charging problems show up in other systems
Low system voltage causes weird symptoms — rough idle, transmission shifts that feel off, ABS or traction-control lights, and Bluetooth or infotainment that reboots. Before you chase a check-engine light, it's worth ruling out the charging system. See our electrical repair bay for the wiring and diagnostic side, or diagnostics for drivability concerns. Full bay list is on our services page.
Honest estimates, real timelines
We don't guess. Every charging or starting concern starts with a full system test, a written estimate, and a clear answer about whether you need a battery, a starter, an alternator, a cable, or just a clean ground. Most alternator and starter jobs are out the same day.
Frequently Asked Questions
How do I know if it's the alternator, starter, or battery?
Slow cranking is usually a battery or starter; dim lights, a battery light on the dash, or dying after a jump-start usually points to the alternator. We test the full charging system — battery load, alternator output, starter draw, and cables — so you replace the right part, not all three.
Do you do same-day alternator and starter replacement?
On most cars and light trucks, yes. Diesel trucks with dual alternators or hard-to-reach starters can take longer, but we'll give you a real timeline up front.
Can you replace alternators and starters on diesel trucks?
Yes — Cummins, Power Stroke, Duramax, and medium/heavy-duty diesels. We handle dual-alternator setups, high-output upgrades, and gear-reduction starters.
Do you test batteries and charging systems for free?
Yes. A quick charging system test is part of any electrical concern. If your battery is weak or your alternator isn't keeping up, we'll show you the numbers.
My truck dies after a jump — is that the alternator?
Usually, yes. If the engine runs only as long as you're connected to a jump pack or another vehicle, the alternator isn't charging. Bring it in before you get stranded.
Do you work on starters and alternators for semis and RVs?
Yes. We service semi trucks, RVs, motorhomes, and fleet vehicles — including 24-volt systems and dual-battery setups.
Ready to get on the schedule?
Call us, book online, or stop by the shop in Jerome.