What are the signs of a bad alternator?

Think your alternator is going out? Call (970) 317-2009 or Book appointment online. Monday through Friday, 8:00 am to 5:00 pm.

What does an alternator do?

The alternator makes electricity while the engine runs. It powers the lights, the radio, the heater fan, and the rest of the electrical system, and it recharges the battery after every start. The battery mainly gets the engine started. Once the car is running, the alternator does the work. When the alternator weakens, the car starts living off the battery until the battery runs flat.

What are the warning signs of a failing alternator?

Most alternator problems show up as electrical symptoms first. Watch for:

• A battery or charging warning light on the dash, sometimes shown as a small battery symbol.
• Headlights or dash lights that dim, flicker, or get brighter when you rev the engine.
• Power windows, the radio, or the heater fan acting slow or strange.
• A battery that dies again a day or two after a jump, or soon after a new battery goes in.
• A whining or grinding noise from the front of the engine that changes with engine speed.
• A hot electrical or burning rubber smell.
• The engine stalling or the car going dead while you drive.

One sign alone does not prove the alternator failed. Several at once is a strong reason to get the charging system tested.

Next step: see our alternator repair in Durango page. Ace AutoFix tests charging first, then explains what failed before any parts come off.

Is it the battery or the alternator?

The two can look the same. A weak battery and a weak alternator can both cause a slow crank or a dead car in the morning. A simple clue: if the car starts with a jump but dies again soon, or the lights fade while you drive, the charging side is a likely suspect. If the car runs fine once started but struggles to crank on cold mornings, the battery is often the first thing to test. Our post on why car batteries fail in Durango cold covers the battery side. Ace AutoFix tests both on our battery and electrical service so you do not pay for the wrong part.

Can I drive with a bad alternator?

Not for long. When the alternator stops charging, the car runs on whatever is left in the battery. That can last a short while, then the lights dim, the engine can stall, and the car may not restart. If the battery light comes on, turn off what you can, such as the radio and seat heaters, and head straight to a shop or somewhere safe. Avoid long drives on US-160 or US-550 until it is checked. If the car does quit, our post on what to do if your car breaks down near Durango walks through the next steps.

What else can cause alternator symptoms?

Not every charging problem is the alternator itself. A loose or worn drive belt, a corroded battery cable, a bad connection, or a failing battery can all mimic it. A check engine light can come on alongside charging trouble too, so mention any lights when you drop off the car. That is why Ace AutoFix tests before recommending parts and writes down what we found. Belt work is on our spark plugs and belts page.

Who tests alternators in Durango?

Ace AutoFix is a locally owned shop at 320 Wilson Gulch Dr, Durango, CO 81301, open Monday through Friday, 8:00 am to 5:00 pm. We test charging and replace alternators on any brand of car and on gas or light-duty trucks. We do not do diesel electrical work. The price is labor and parts, with no supply or disposal fees, and we send text and photo updates so you can see what we see.

Book with Ace AutoFix

Call (970) 317-2009 or Book appointment online. Ace AutoFix is locally owned at 320 Wilson Gulch Dr, Durango, CO 81301, open Monday through Friday, 8:00 am to 5:00 pm. Cars and gas or light-duty trucks. No diesel.