Question about 1998 Mazda B-Series

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My 98' Mazda b2500 keeps dying. Changed the alt and battery. Someone told me it was the voltage regulator ut someone else said its built in the alternator. Can you please help me.

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  • Sev Banks May 14, 2015

    How would I know if there is power to the alt to turn it on?

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  • Mazda Master
  • 3,218 Answers

Keeps dying? Do you have to boost it? The voltage regulator is internal to the alternator. Is there power to the alternator to turn it on? LOts of could be's here without more info

Posted on Apr 11, 2015

  • 2 more comments 
  • Sev Banks Apr 11, 2015

    The battery gage is really low and if I turn my lights on it will go dead within minutes.

  • Sev Banks Apr 11, 2015

    The battery gage is really low and if I turn my lights on it will go dead within minutes. And I keep having to jump it...

  • paulmacintyre
    paulmacintyre Apr 11, 2015

    The alternator is not charging.Check all fuses first. You then have to check the small plug a the back of the alternator ( poaaibly 2-3 wires ). One of them needs to have power with the key in the on position. If no power on any wire, that will be your problem. If there is power on at least one wire, the alternator is no good. But first, make sure there is no fuses blown that supply power to the plug. Check ALL fuses in the fuse box

  • Randy Ohler Apr 11, 2015

    Make sure of a good ground also. Yours isn't grounded by the PCM.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

stormbrewin
  • 426 Answers

SOURCE: i have changed my battery 3 times and it keeps going dead

Did they test the output only, 13.5 to 14v if it was all that was tested there are two other possibilitys that the alternator needs testing for Voltage regulation which will fry a battery (over charge and cells collapse)or the diodes have failed which will flatten a battery overnight.

Posted on Oct 22, 2008

csmock132
  • 4669 Answers

SOURCE: Battery dosn't charge, alternator/voltage adapter test's good.

Did you test the Alternator on or off the truck? It might be a problem with the control system to the Alternator. The regulator need a battery feed to work, It is usually ran through an alternator fuse.

Posted on Mar 11, 2009

kirkx
  • 2019 Answers

SOURCE: charging system

If you have changed the alternator and regulator, about all that could be left would either be a short circuit that is draining current away, or a bad ignition warning light bulb. That is because the power to energize the field of the alternator, comes through this dash bulb.

Posted on Jul 25, 2009

  • 139 Answers

SOURCE: I have a 2004 Mazda 6 with the 2.3 liter engine.

Could be a eloctronics fault! Have a reputable autolect.shop do a diagnostics check, alternativ solution fit a Bosch replacement alternator.
Regards
Phillip

Posted on Sep 12, 2009

dsakrison1
  • 65 Answers

SOURCE: 98 mazda b2500-my turning signal/hazard lights no longer work

You need to replace the flasher module, this is the module that controls the "Blinking" function of the lights, its a mostly a common part that you can get at any auto parts store for less than 10 bucks and is located in the Fuse panel under the dash, its round in shape in one corner of the panel. mostly they are green in color.

Posted on Oct 02, 2009

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Hey Rick ,I don't know what you have so it makes it harder to help you ,I don't dough you checked battery and alt . unless you have a dead short the battery should hold a charge , as far as the alt. most have an internal built in regulator , start the vehicle when its running disconnect the battery if it dies its the alt .

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Voltage regulator is built-in to the alternator assembly.

Have you tried replacing the battery?
A battery with a shorted cell will not charge properly and may even damage an alternator or regulator.

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Note2: from Jan 98 to May 98 shows a different part # alternator than June - Dec 98
check the manufacture date on your driver door edge.

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