Question about 2006 Chevrolet Cobalt
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Posted on Jan 02, 2017
When the engine is running fast idle, the battery voltage should read 13.5 to 14.5 volts if the alternator is delivering charge to the battery. If the old alternator had a shorted diode, the very high current from the battery back through that diode will burn out what is known as a fuse link which is located within the wiring harness and it will effectively disconnect the alternator output from the battery. The battery end is connected at the starter terminal where the positive battery cable also connects.
Posted on Aug 18, 2009
On some of the older style GM's you can take that brown wire and cut it and take the end leading from the alternator and hook it directly to the hot terminal on the alternator and just leave it hooked up and it will work. But I have ran into the occasional problem where leaving it hooked up will drain the battery when the vehicle isn't running. Hope this helps..
Posted on Oct 25, 2009
Testimonial: "I fixed the problem - the terminal at the brown wire was corroded - after cleaning and recrimping - everything works - thanks for the heads up"
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