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The Water Cooler
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<blockquote data-quote="KOPBET" data-source="post: 2580434" data-attributes="member: 4153"><p>You don't say one way or the other, but I assume the A/C is factory and not retrofit, and the alternator is the correct amperage for the car. Yes, as mentioned the 76 has an internal regulator. </p><p></p><p>You don't necessarily need Autozone to check your alternator, a simple voltmeter capable of measuring DC volts and AC millivolts will do the job. Lots of stuff on the web to show you how. The alternators are also pretty easily repaired with basic tools and $15 in parts from NAPA.</p><p></p><p>Old Corvettes are often grounding headaches. Check the ground strap from the engine block to the frame (remove bolts and clean) and the ground strap from the battery to ground. Check the voltage at the red wire on the back of the alternator. Measure DC volts with engine running, around 13-14 vdc. and A/C volts in the millivolt range. Make sure it isn't loose, but don't over tighten. Check the drive belt also, make sure it isn't severely glazed, loose or slipping.</p></blockquote><p></p>
[QUOTE="KOPBET, post: 2580434, member: 4153"] You don't say one way or the other, but I assume the A/C is factory and not retrofit, and the alternator is the correct amperage for the car. Yes, as mentioned the 76 has an internal regulator. You don't necessarily need Autozone to check your alternator, a simple voltmeter capable of measuring DC volts and AC millivolts will do the job. Lots of stuff on the web to show you how. The alternators are also pretty easily repaired with basic tools and $15 in parts from NAPA. Old Corvettes are often grounding headaches. Check the ground strap from the engine block to the frame (remove bolts and clean) and the ground strap from the battery to ground. Check the voltage at the red wire on the back of the alternator. Measure DC volts with engine running, around 13-14 vdc. and A/C volts in the millivolt range. Make sure it isn't loose, but don't over tighten. Check the drive belt also, make sure it isn't severely glazed, loose or slipping. [/QUOTE]
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