Question about 1988 Toyota Pickup

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1988 toyota truck won't charge

Alternator, battery, all terminals and grounds- all are good. Charge light in dash is on, dash guages and windshield washer are off, and battery is not getting charged. Alternator belt is good. Bad charging system relay? Plug-in connector on alternator bad? Any way to figure it out without trial and error replacement?

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  • avasen Apr 23, 2009

    Alternator has been tested. Main wire connector to alt. looks good and I cleaned well. Plastic plug-in connector looks fine but has white paste-like substance in some of the female sockets that I took to be contact paste. Is this my problem? Should I clean it out w/electrical cleaner and file contacts?

  • avasen Apr 24, 2009

    Have 12v continuity to battery from alt. Regulator is integral to alt; it all tested out fine at napa. I will clean all contacts in plastic connector tomorrow ; if that doesn't do it I will replace connector. I will let you know.



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If the brake light is on in the dash your ALTENATER is bad this a comin prob with toyotas for 1986 to 1995 all so check the wires from your BAT to the fuse box thay all so gobad you may need to remove the cover and check wire to be shur its not brok look for the white wire with black stripe10 gage

Posted on May 27, 2009

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Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts.
>>>>> If not the alternator may need replacing.

Check this link...

Kindly rate the answer.

Posted on Apr 24, 2009

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Is the alternator new? has it been tested? U need to be 100% sure on this, if U are then the connectors to the alternator are the next place to look, check for burnt discolored connector terminals and burnt looking plastic shells on the connector.I CONTACTED A FREIND WHO KNOWS THIS MODEL AND HE SAYS THE ALTERNATOR CONNECTORS CAUSE THIS ISSUE, U SHOULD BE ABLE TO BUY A REPAIR CONNECTOR FROM THE DEALER

Posted on Apr 23, 2009

  • 1 more comment 
  • yadayada
    yadayada Apr 23, 2009

    if there is any doubt repair it or replace it.

  • yadayada
    yadayada Apr 23, 2009

    U are sure the voltage regulator connector is good?

  • yadayada
    yadayada Apr 24, 2009

    do u have 12 volts to the alternator, the heavy gauge wire? that is the charging circuit to the battery.


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Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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