Car electrical repair in King City
Car won’t start, battery keeps dying, or the battery light is on? We test the battery, alternator and starter to find the real cause (a charging system diagnostic is $60) and put the repair price in writing before any work starts.
Signs of an electrical problem
A slow crank or a click when you turn the key, a battery that keeps going dead, dim or flickering headlights, the battery warning light on the dash, or a fuse that keeps blowing. A new battery won’t fix a bad alternator. That’s why we test before we replace anything.
What we do
Battery testing and replacement, alternator replacement, starter replacement, fuse replacement, and charging system diagnostics, on most cars and trucks (no luxury, diesel, or EV). Every repair carries our 60-day / 5,000-mile warranty on labor and the parts we buy.
What it costs
A charging system diagnostic is $60. Once we know what failed, the repair estimate is free and in writing, and nothing starts until you approve it. Prices current as of September 2026.
$60 at JM Auto Repair. It tells you whether the problem is the battery, the alternator, or something draining power, before you buy parts.
If the car starts after a jump but dies again soon, or the battery light comes on while you drive, the alternator is a common suspect. If it won’t crank at all after sitting, it’s often the battery. Testing tells you for sure.
Yes, all three, plus fuses. We test first so you only replace the part that actually failed.
Most cars and trucks, yes. We don’t work on luxury, diesel, or electric vehicles.