Alternator, Battery & Charging System Repair

Your battery, alternator and starter work as a team. When one struggles, the others often get blamed. A new battery won't last if the alternator isn't charging it, and a new alternator won't help if something is draining the battery overnight. That's why we test the whole system before recommending a part.

Warning signs

• Slow or labored cranking, especially on cold mornings
• Clicking with no crank
• Battery or charging warning light on the dash
• Headlights and dash lights that dim at idle or flicker
• A whining or grinding noise from the alternator
• A battery that dies after sitting a day or two
• Swollen battery case or heavy corrosion on the terminals

What we do

• Battery testing under load, plus terminal and cable cleaning or replacement
• Battery replacement with the right size and cold-cranking rating for your vehicle
• Charging system test: alternator output, voltage regulation and belt condition
• Alternator replacement with quality parts
• Starter diagnosis and replacement
• Parasitic draw testing to find what's draining the battery with the key off

Diesel trucks and dual batteries

Most diesel pickups use two batteries to crank a high-compression engine and run glow plugs or a grid heater on cold starts. When one battery weakens, it drags the other down, so we test them as a pair and usually recommend replacing them together. Heavy-duty trucks with plows, lights or upfitter equipment also put extra load on the alternator; we'll check that it's keeping up.

Get ahead of winter

Missouri cold snaps are hard on weak batteries. A quick test in the fall can save you a no-start on the first frigid morning.