Question about 2003 Kia Spectra

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I have a 2003 kia spectra 1.8 liter. The alternator isn't charging the battery but when I took it off and had it tested 3 times it passed every time. The belt is tight enough and I replaced the plug cause the clip was broke off it. Is there an alternator fuse or voltage regulator I need to check?

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  • Brys Cheek
    Brys Cheek May 08, 2011

    Thanks for such a quick solution! I looked there for a fuse but couldn't find one. I looked on the diagram showing every fuse and list and didn't see one that said anything about the alternator.

  • Brys Cheek
    Brys Cheek May 08, 2011

    Thanks for such quick solutions! At this point if I can't fix it, I'm gonna just run the alternator straight to the battery with some 4 guage and a fuse. I'm just so frustrated

  • Brys Cheek
    Brys Cheek May 08, 2011

    Thanks for such quick solutions! At this point if I can't fix it, I'm gonna just run the alternator straight to the battery with some 4 guage and a fuse. I'm just so frustrated

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  • Kia Master
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Hi, there are 3 fuses the the alternator needs to charge the battery. These may be inside the car or in a box in the engine compartment. They are named IG1, ECU, and ALT. If you have trouble finding them, please get back to me.

I have a 2003 kia spectra 1.8 liter. The - jturcotte_1672.gif

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Posted on May 08, 2011

  • 9 more comments 
  • Jeffrey Turcotte
    Jeffrey Turcotte May 08, 2011

    You will need to determine which wire is bad. Is the voltage at the alternator 14 volts or more? If yes, then the charge wire/fuse is bad. If the voltage at the alternator is less than 14 volts, the stator wire/fuse is bad.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 09, 2011

    Sorry, I found another diagram that shows the charge fuse as 80 amps and it's called "MAIN." Not sure which diagram is correct but worth looking for this fuse.

  • Brys Cheek
    Brys Cheek May 10, 2011

    Can't find all 3 fuses. I can only find the one mark IGN

  • Jeffrey Turcotte
    Jeffrey Turcotte May 11, 2011

    OK, I have found yet another diagram. This one seems to be closer to the mark, as it has the same number of wires as your alternator. The sense wire goes thru a 25 amp fuse called "HEAD," and the charge wire has no fusing at all. Please see if you can find the fuse called "HEAD" and check it. Sorry about all the trials and errors. On the bright side, if this diagram is right this should be easy to fix.

  • Brys Cheek
    Brys Cheek May 11, 2011

    Alright thanks! I think I may have found the culprit. I cut the insulation off the positive lead on the alternator and the wire was solid green with corrosion. Gonna replace it and see what that does. I'm pretty sure this is the problem. I had the same problem with the negative lead on this car and new wire fixed it

  • Brys Cheek
    Brys Cheek May 12, 2011

    Well I replaced the positive lead to the alternator but that didn't fix it. Found two fuses marked head but they're HEAD L and HEAD H which is headlights. I'm at a loss here

  • Jeffrey Turcotte
    Jeffrey Turcotte May 12, 2011

    OK, so if you have a new wire to the battery, the problem has to be the sense wire. If you pull the connector off the alternator, there are just 2 wires there, right? See the connector below and probe the connector with a voltmeter or test light to see if there is power on the sense wire when the key is on.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 12, 2011

    If you don't have a voltmeter or test light, you can just hotwire that terminal to the battery to see if the alternator will charge.

  • bryan
    bryan Apr 14, 2014

    right now i have the same issue.. at the connector theres battery voltage at the wire in line with the 25 amp fuse.. the other wire shows .4 less then batter voltage.. vehicle running shows 12.0.... so no charging?

  • Jeffrey Turcotte
    Jeffrey Turcotte Apr 14, 2014

    right, the batteru needs about 14 volts to charge.

  • Eric Powers
    Eric Powers Jan 04, 2015

    Hello there, I need a better picture or the wiring diagram.

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The voltage regulator is internal for these alternators.check to see how many volts are getting to your battery using a volt meter at the battery terminals while the engine is running exercising caution at all times. a reading of 13.2 and above means you have proper voltage from the alternator to the battery. clean and check all connections at the battery and connections at the alternator including the small wire that bolts to the back of the alternator close to the connector.

Posted on May 08, 2011

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  • Kia Master
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To make sure that the alternator is charging do this ! when car is running, remove negative cable from battery and if car keeps running its ok. but if car dies the alternator is bad or a bad wire to battery.. the voltage regulator is built in the alternator on todays cars. start by checking all fuses then go to above to try it out. have a good day ! if its charging ok, it could even be a bad battery thats not holding a charge.

Posted on May 08, 2011

  • Brys Cheek
    Brys Cheek May 08, 2011

    I pulled the negative off and it died. Had the alternator tested and it passed so I guess I get to chase wires till I find a short or opening. How could I run a wire straight to the battery from alternator? What would I have to do about the 2 wires goin to the plug on the alternator?

  • carl May 09, 2011

    as for running a wire straight to battery is not reccomended. It generates power for all of your accessories such as lights, radio, power windows/locks etc. You might be thinking the battery does this but really all the battery does is provide the spark to start your car.

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  • Kia Master
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The voltage regulator is built in the alternator, as for the fuse for the charging its in the power junction box in the engine compartment

Posted on May 08, 2011

  • Chase Trent
    Chase Trent Apr 27, 2019

    What number is the relay or fuse

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