Where is the charge warning light on a GM alternator?
But this is not a simple bolt-on conversion. The 10- and 12-SI units use a different two-wire connector plug on the rear of the alternator. The Number 1 wire on the 10- or 12-SI is connected to the charge warning light on the dash. The Number 2 wire is what is called the voltage sensing wire.
How can I tell if my alternator is working or not?
If the battery is working properly and nothing is wrong with it, then it’s the alternator that will more likely cause a problem. A simple test to check the working of the alternator is by running your car; and then unplugging the positive connection of the battery.
How many amps does an alternator have at idle?
Based on multiple factors — like alternator design and pulley ratios — an alternator’s output at idle can be far less than its maximum rating. The original 10-DN externally regulated alternator is probably not capable of much more than 35 amps at idle. Back in the days of AM radios, that was enough to maintain system voltage.
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 are the symptoms of a bad alternator in a GMC Sierra?
Here are the most common symptoms of a bad alternator in a GMC Sierra: 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.
How to diagnose an alternator or electrical problem?
Diagnosing alternator problems can be a bit tricky because the electrical system in a car comes from two places, the battery and the alternator. I’ll give you a little background so you can understand what both systems do. The battery has one primary function, which is to start the car.
What happens if you have a bad alternator in your car?
The car won’t start at all. If the problem is a bad alternator, your car will slowly lose power. You’ll be driving down the road, your lights will dim, and you’ll lose power and die. If the problem is with your battery, then you’ll generally only have trouble starting your car since that’s the battery’s main function.
Where can I buy an alternator for my car?
Car parts are normally listed in the automotive section of the want ads. Craigslist is another good source of car parts. People parting out vehicles often sell the parts online and if you know what you’re looking for, bargains can be found. Auto parts stores often sell second hand or rebuilt car parts, including alternators.
But this is not a simple bolt-on conversion. The 10- and 12-SI units use a different two-wire connector plug on the rear of the alternator. The Number 1 wire on the 10- or 12-SI is connected to the charge warning light on the dash. The Number 2 wire is what is called the voltage sensing wire.
How many alternator pigtails are left in stock?
Only 16 left in stock (more on the way). . Only 18 left in stock – order soon. . . Only 3 left in stock – order soon. . Only 12 left in stock (more on the way).
Are there any disadvantages to one wire alternators?
Another minor disadvantage to one-wire alternators is the rotor in the alternator must achieve a certain speed to self-excite. This usually requires the driver to rev the engine to increase internal voltage to sufficiently excite the alternator to begin charging.
What to do when your alternator is not working?
With the engine idling at operating temperature, turn on all the electrical components such as the headlights, blower motor at full speed, four-way flashers, electric fans, and the stereo at a reasonable level. Then, note the electrical system operating voltage.