What are the symptoms of a bad alternator in a Chevy Trailblazer?

Here are the most common symptoms of a bad alternator in a Chevy Trailblazer: The battery light is designed to tell you that there is not enough voltage to properly charge the battery, or that the battery itself is not holding the proper voltage. In rare occasions the service engine soon light may light up.

What should the volts be on a trailblazer?

With your Trailblazer turned off, you’ll connect the negative side of the meter to the negative battery post or wire. You’ll then touch the positive side of the voltmeter to the positive battery wire. With the engine off, you should get a reading somewhere between 12.0 volts and 12.6 volts.

What does the battery light mean on a Chevy Trailblazer?

The battery light is designed to tell you that there is not enough voltage to properly charge the battery, or that the battery itself is not holding the proper voltage. In rare occasions the service engine soon light may light up.

When does a GM alternator need to be replaced?

A GM alternator that is producing too much voltage must be replaced. When a car does not start or the lights are dim, it may be because the voltage output has dropped lower than 13.5 volts. When this happens, the battery is not being charged, and the electrical systems of the vehicle will fail.

Where can I find a Chevy Trailblazer near me?

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Where to put black lead on bad alternator?

Place the black lead on the bad post of the alternator. Same thing as above, if the voltage is above 0.5v then examine the positive cabling for problems. Highly active question.

What to look for in an alternator Charger?

Turn on all the loads (blower on high, headlights on, rear defrost on, and so forth). Measure the voltage across the battery and the big bat alternator terminal to alternator case. There are two things that you are looking for.

What kind of wiring is in a 1983 Chevy Blazer?

WIRING INFORMATION: 1983 Chevy S-10 Blazer WIRE WIRE COLOR WIRE LOCATION 12V CONSTANT RED Ignition Harness STARTER YELLOW OR PURPLE Ignition Harness IGNITION PINK Ignition Harness ACCESSORY ORANGE Ignition Harness POWER DOOR LOCK (5-wire reverse polarity) LT.

How can you tell if your alternator is bad?

The battery stores enough voltage to be able to start the engine without the assistance of an alternator. It is turned by a serpentine belt. It’s worth noting that a bad serpentine belt can cause the alternator to stop charging effectively. It’s pretty easy to tell if one is bad. It’ll look dry rotted.

Why does my Chevy Silverado battery drain while driving?

If it is draining while your Silverado is off, it’s usually caused by something that is drawing current that shouldn’t be. If the battery is draining while you’re driving, that is probably going to be the alternator or battery. There are other situations as well.

Can a bad serpentine belt cause an alternator to fail?

It’s worth noting that a bad serpentine belt can cause the alternator to stop charging effectively. It’s pretty easy to tell if one is bad. It’ll look dry rotted. If it’s been slipping a lot it’ll have a glossy shine to it. You’ll have probably heard it squeal when you start the engine. They typically don’t fail quietly.

What are the symptoms of a bad alternator in a Chevy Silverado?

Outside of the battery warning light, a dead battery is the most common symptom of a bad alternator. As the alternator can no longer supply your Silverado with an adequate power supply, it will begin to feed off of the reserve in the battery.

What does it mean when your alternator is not charging?

If the alternator is not charging the battery, you will have a red “ALT” or “charge” sign on your dashboard. This means that your battery is no longer being supplemented for power by the alternator. You will need to recheck the wiring because the light could also be faulty.

What happens when the alternator of a car is dead?

The alternator and the car’s battery work hand in hand. A good battery should give you service for the next five years before its lifespan ends. If your battery is dead, then it will not give power to the car’s alternator. The alternator normally lasts longer than the battery.

Do you need an alternator for a 12 volt car?

If you got 14.2 or more volts, the alternator is charging fine. If it’s still showing in the 12’s, it’s time to replace the alternator. If it’s producing a voltage level in the 13’s, go ahead and take it into a parts store and have it tested. It’s probably bad.

Why does my car not start with a new battery and alternator?

With a new starter, battery, and alternator (assuming you have not drained the battery attempting to start it), the starter should attempt to crank over the engine. If the starter does not make any noise when the key it turned to crank over the engine, you have an issue with the fuses, or the circuit.

What happens if you have a new alternator and the battery is not charging?

The alternator in your car is an integral part of your vehicle’s electrical system. If you have a new alternator and the battery is still not charging, then you definitely have some kind of a problem with your battery that you’ll need to address immediately.

Can a bad alternator cause a bad starter?

If the alternator is bad, the battery may not be capable of starting the engine. Starter – Some solenoids are mounted to the starter, but some are located directly inside the starter housing. When this is the case, it may be necessary to replace the entire starter when the solenoid goes bad. Sometimes the starter itself is the problem.

What should the charge voltage be on an alternator?

Turn on the high beams for 10 seconds and then turn them off. Measure battery voltage across the battery posts with your DMM. You should get between 12.4 and 12.6V. This means your battery is fully charged. If you get a reading below 12.4V, charge the battery before continuing. 5b. Measure the Charging System’s No-Load Voltage

When to know if your alternator or battery is bad?

If you check hours or days after the fact, then you won’t be able to smell anything anymore. Before you go out and order a new battery or alternator, test some of these different systems. If your alternator, coil, battery, or starter is bad, the car probably won’t start, and it definitely won’t be drivable.

What does it mean when an alternator light comes on?

If the light illuminates only intermittently, it usually indicates a loose or worn drive belt or serpentine belt, worn-out or bad carbon brushes in the alternator. But remember that the light doesn’t always mean there is a bad part; the light may be triggered by a sensor giving a wrong message or there’s something wrong with the circuit itself.

When does the alternator light turn on the battery?

On older vehicles, the battery light would turn on the alternator light when the alternator output or battery voltage dropped below a preset value. The battery light on modern vehicles, however, is controlled by data and trouble codes. This is why a scan tool is essential to diagnosing a charging system.

Where is the volt meter on an alternator?

To diagnose the problem, put the positive wire of your volt meter on the alternator output terminal and the negative wire of your volt meter on the battery plus terminal. Put some load on the battery, such as lights or something, rev the engine, and see how much voltage is getting dropped between the alternator output and the battery terminal.

Why does my car have a bad alternator?

Many so-called alternator problems turn out to be nothing more than a bad connection at the alternator or a bad wiring harness. If you see a modern vehicle that measures the life or temperature of the battery, it is bad practice to use the positive and negative battery terminals to power aftermarket accessories.

Why does my 2005 Chevy Trailblazer die at idle?

Clean it thoroughly and then take it on a test drive. Once the idle is re-learned, your problem will be solved. Also the radio control **** to turn channels or volume and on and off won’t work the radio and cd will switch back and forth,, what could could cause this — 2005 trailblazer.

Why is the radio not working on my 2005 TrailBlazer?

Also the radio control **** to turn channels or volume and on and off won’t work the radio and cd will switch back and forth,, what could could cause this — 2005 trailblazer. You may need a new radio. It would have to checked out to be sure.

What kind of engine does a 2002 Chevy Trailblazer have?

2002 Chevrolet Trailblazer EXT 4.2L Engine. It died on me the other day I got a boosts. Later that day I got a new battery. They check the alternator and its fine. We notice the back AC was on and the truck turns off even when we turn on the ac

What causes a Chevy Trailblazer to stall at idle?

We notice the back AC was on and the truck turns off even when we turn on the ac or heat on the front it shuts. Off what could be the problem. Answer: Stalling with the A/C on at idle is usually caused by carbon build up in the throttle body. The throttle body bore and plate should be cleaned with a carbon cleaner spray.

What are the problems with a 2005 Chevrolet TrailBlazer?

Worst 2005 Chevrolet Trailblazer Problems #1: Fuel Gauge Not Working 2005 Trailblazer Average Cost to Fix: $400 #2: Instrument Panel Malfunctioning 2005 Trailblazer Average Cost to Fix: $400 #3: Speedometer Stopped Working 2005 Trailblazer Average Cost to Fix: $400

Why does my Chevy Trailblazer make a whining noise when accelerating?

A whining sound when accelerating is almost always caused by a bad accessory attached to your Trailblazer’s engine. Here are the most common causes of whining noises when accelerating: 1. Bad Alternator When an alternator is going bad, it’ll often begin to put out a high pitched whining sound. It should also be accompanied by the battery light.

What kind of problem does a trailblazer have?

I have a 2008 Trailblazer LT , and recently after I start the vehicle, the heater,dashboard lights,alternator go off , the battery light comes on. After 2 to3 minutes everything come back to normal any ideas?

Is the instrument cluster on the Chevrolet TrailBlazer out?

I also need to vent about my personal feelings, regarding the absolutely pitiful lack of customer service concerning this issue, so please bear with me.

What should the voltage be on a GM alternator?

Ideal Voltage Output Ideally, the GM alternator should be putting out anywhere between 13.5 and 14.5 volts. A voltage regulator helps regulate the voltage that an alternator provides. If the voltage dips below the optimal range, then the regulator kicks in to get the alternator to make more voltage.

What happens when an alternator does not work?

The alternator becomes overloaded and these systems stop working. This results in a car that stops and does not start. When the alternator doesn’t work, the energy to power these things comes from the battery, soon worn down from lack of charging. It is pretty simple to measure the output of a GM alternator.

What should the voltage be in a Chevy alternator?

When your Chevy is running, you should get approximately 12.8 to 14.0 volts of power, and there is a quick and easy test to determine if your regulator is over- or under-performing. Place the red lead of you multimeter onto the positive battery terminal on your car battery.

What are the symptoms of a bad alternator in a Chevy Blazer?

Here are the most common symptoms of a bad alternator in a Chevy Blazer: The battery light is designed to tell you that there is not enough voltage to properly charge the battery, or that the battery itself is not holding the proper voltage. In rare occasions the service engine soon light may light up.

What causes an alternator to go over base voltage?

If you are getting more than 2 volts above base voltage, most likely your alternator is over-charging the battery or the battery is faulty. Other potential problems are a faulty voltage regulator or a problem in the charging system wiring.

What is the voltage regulator on a Chevy?

The voltage regulator is built into the alternator on all Chevys made from the 1980s to at least 2010. Simply put, the regulator restricts the amount of voltage being sent to the battery. Without a regulator the battery would receive upwards of 30-volts of power while charging, which would quickly damage or destroy your battery.

What are the symptoms of a bad alternator in a Chevy Trailblazer?