Question about 1990 Honda Civic

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1990 Honda Civic dx intermittant alternator failure

I have replaced the battery twice, the alternator twice, and the same symptoms persist. The car will not start intermittantly without a jump. It is never possible to anticipate when this will occur. Occationally will have to be towed because the jump will not work.

Last go around... the battery and the alternator were tested. One time the shop said the battery was bad, another time they said the alternator was bad, and today, when nothing has been changed, they say that they are both good and nothing is wrong with the car. The claim by the shop is that there is no electrical drain.

I tested the voltages myself. The battery before starting was 12.5v approx., After starting, same. After loading (turning on lights) kicked in alternator to 14.5v. Was told by shop that this is normal for the type of alternator.

Thanks for any info on this intermittant problem.

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  • josh1111 May 11, 2010

    get the ignition switch and rensor checked

  • jetfixr May 11, 2010

    Honda's are notorious for having problems with the main relay. Most suffer from cold solder joints. This may not be the problem but it is something to look into. It is possible to remove the relay and resolder all the contacts. I think a new relay is about $50. You may want to visit someone who specializes in Honda, they should be familiar with the main relays.

  • mike loshbough
    mike loshbough May 11, 2010

    check battery after 6 hour for drain and voltage read it but dont start it

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Check all you earth staps to body and engine - ensure they ar free of corrosion - take them off and clean them up if dirty.This problem is usually worsened as the vehicle heats up and reistance increases as it does so.

Posted on Aug 14, 2012

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Along with the relay issue they some models have a very tight route for wiring from the battery to the main harness components check very carefully for any tight spots the wires may be severed also check the frame ground from the - battery terminal wire and connection itself. last suggestion do you get lights and accesories when this happens or is everything dead if you do it could be a bad connection to the starter and have nothing to do with the alternator or battery

Posted on Mar 25, 2009

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