Electric problem on 1983 GMC 2500 Pickup

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Old 04-21-11, 03:37 PM
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Question Electric problem on 1983 GMC 2500 Pickup

There are 2 wires that plug into the alternator, where do these wires go, one is red and one is black. Thanks for your help.
 
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Old 04-21-11, 04:49 PM
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Are you saying they are just dangling, now? If not, you can trace them with your hand, probably red to fusible link on battery and other to a ground, or both to the fuse panel, not sure on the 83.
 
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Old 04-21-11, 11:48 PM
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One is for the alt idiot light on the dash and the other one has +12 volts when the key is on to excite the voltage regulator.
 
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