Why is my alternator shorting to ground on my Blazer?

Another symptom, one of the three wires coming off the ring connector connected to the back of the alternator is also shorting to ground but only when the horn fuse is installed (?) I cut the wires to separate them so that I could figure out which was shorting to ground.

Is there a problem with my Chevy S10 Blazer?

1994 Chevy S10 Blazer: electrical..the alternator there is connector… I have an electrical problem… I have an electrical problem with a 1994 Chevy S10 Blazer. Alternators have been burning up.Some things we have found in testing: On the alternator there is connector with two wires, brown and pink.

How many volts does a S10 Blazer have?

Below is the diagram I am looking at. Yes, C100 is the bulkhead connector, and yes, there is a fuse panel direclty behind it. One of the Pink/Black wires shows to go to the 20 amp IGN/GAU fuse. Therefore, you should see 12 volts on that circuit 39 Pink/Black wire at the Alternator.

How to know if your Chevy S10 has a faulty alternator?

Steps Verify whether your Chevy S10 has a faulty alternator. Access a voltmeter and start the truck. Make contact to the battery with the voltmeter and look for a reading of 14.2. Assume that the alternator is not properly charging if the reading is below 14, or higher than 14.3. Turn on the lights and the radio.

How can I tell if my alternator is charging?

The alternator is charging if the battery voltage stays above 13 volts with the engine at 2,000 rpm and all accessories on. Check the alternator gauge. If you have a volt/amp gauge, it will read the alternator output for you.

What should I do if my alternator is not working?

Even if you conclude the alternator is not working, the problem may originate elsewhere. You may have a blown fuse, a bad relay, wiring, or a defective voltage regulator, for example. Thanks! Some people recommend testing the alternator by starting the car, loosening the negative battery cable, and waiting to see whether or not the engine dies.

What should the voltage be on an alternator?

With the electric devices running and the engine running at 2000 RPM, the voltage should read 14. Test the wiring if the charges aren’t in the proper range, as the voltage reading alone doesn’t fully diagnose a faulty alternator. Assure that the vehicle is still running.