Battery Indicator Light Flickering – Alternator Problem?

Complete Transmission Repair Cost Guide Transmission Forum – Ask an Expert Mitsubishi Battery Indicator Light Flickering – Alternator Problem?

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  • #1524
    Administrator5
    Keymaster

    I would like to ask your suggestion about the problem of my car. Its a mitsubishi magna es 3.5 AT. And we’ve been running now for 20k kms plus now its 170k odo since i bought i service it 2 times engine and transmission also. Here are the signs and symptoms it started 3 days ago:

    First the battery indicator sometimes it flickers when the key is switch to on and i know its not normal. That day also i started to feel the delay or lag change of gear going to 4th it revs then goes to 4th. I can feel that on a high speed run when im pressing the accelerator deep without releasing. Before it changed smooth. The last transmission oil change my mechanic get a small piece of metal attached from the bolt.

    The second day i started to feel that when you change gear from N to D or P to R before i can feel the engagement the car moves and strong. But now it faded you can only feel the engagement less when changing. Yesterday while running i notice my ABS and Handbrake indicator comes on and off. So i ask a mechanic that works in mitsubishi company he said 95% probable cause is the alternator. I tested only my battery when off and running it gives normal voltage.. and thinking to do more further voltage test DIY. Im seeking help because i have that only car working 6 days a week traveling 150kms a day. Here’s the picture of that metal part.

    Part

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    #1532
    Hostgator
    Member

    If the battery light is illuminating intermittently, your problem is somewhere in the charging circuitry. Starting logically, have your mechanic do a battery stress test. This is something for which his facility is equipped. The test puts stress on your battery and shows whether it is in good shape. Next, take a look at the belts just to make sure they are tight and in good shape. It may seem as if this is an obvious check but it isn’t. There should be no shiny spots or wear marks.

    Next, have your mechanic perform load testing on the alternator to make sure that it is working correctly. It could easily be that a secondary winding is starting to fail and that may be causing the issues. Equally as important, though, is the output circuitry. Be certain that you have a diagnostic routine performed on all parts of the charging system, including the various circuit boards. All it takes is one flat pack failure or intermittency and you can have the issues you are talking about.

    Be sure that you have all parts of the electrical system run or tested to make sure that there are no shorts or opens in the wiring. Yes, this can be expensive, but it has to be one.

    I noticed you also indicated that your transmission is having issues. Since your battery and charging system are showing problems, it is possible that one or more of your transmissions sensor arrays or solenoids could be failing. Watch for any error codes that might indicate transmission problems. Have the solenoids tested independently (they should open and close with a sharp click when energized) just to be sure they are working correctly. A sticking solenoid can cause stumbling and performance as you described.

    There are so many possibilities. Have your mechanic perform a general diagnostic to see if there are any other areas of trouble that might be identified.

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