Question about 1988 Chevrolet Caprice

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My fiance just changed the motor in his 89 chevy caprice to a 305. he put a new alternator in it and its not holding any charge. The care keeps shutting off when you drive or if we charge the battery hours at a time it will drive for a bout 10 minutes then when we turn it off it wont start back up. We didnt buy a "brand new" battery but we have tried several batteries and it continues to do the same thing?? Any ideas?

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  • Chevrolet Master
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Have you checked alternator output to see if it is getting from the alternator to the battery ? Could be a blown fuseable link or other wiring issue.

Posted on Feb 11, 2014

Testimonial: "Thats what we are thinking. I will tell him to check that out. thank you!"

  • kortni_stewa
    kortni_stewa Feb 11, 2014

    Do you know where the output could be? and the fuseable link? And if it is wiring issue what type do you think it could be?

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Posted on Jan 02, 2017

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SOURCE: My 96 chevy Tahoe wont

Check the big red wire on the back of the alternator for power. The wire likes to get corroded in half inside the casing but is still held together BY the casing. you can even take a jumper cable from the positive side of the battery to the big/single wire on the back of the alternator. Now , you could have a bad ground also. take a voltmeter or test light and with the ground of the tester on the ground of the battery check for power on the case of the alternator. Another thing , does the alternator or charge light on the dash light up woth the key off? the alternator knows to "start-up" or "field-up" by the power it recieves through the bulb before the engine is started. once the engine starts the small brown wire on the alternator goes hot and shuts the light on the dash off cause it now has power on both legs of it. if the bulb blows then the alternator won't field-up. good luck. Scott

Posted on Sep 26, 2008

  • 17 Answers

SOURCE: new battery and alternator. Battery still won't hold charge

Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.

Posted on May 24, 2009

  • 1 Answer

SOURCE: my chevy malibu wont start.

I have a 1999 Cutlas Olds, recently i have been having an issue with the car starting. When i turn the key it will not make a sound nor does it start, other times it will start right up. Can some one please direct me because im not sure what could be wrong.

Posted on Apr 25, 2013

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1 Answer

Take post off positive on 89 caprice classic 305 and the car dies that's 2 alternators I try


it's normal to engine to stall because alternator won't keep engine running. the field control of alternator goes with the batt.voltage then no batt.voltage no field control then no charge
look for good connection at alternator . look for current on one of 2 wire alternator ignition key on (is control by a fuse)

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