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Thread: alternator issue still....

  1. #1
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    alternator issue still....

    so i thought that my underdrivers were causing my lights to dim at wot. i put a post up here and everyone helped me out and directed me to my alternator. so i called dbelectric and ordered a new one. got it saturday, and threw it on at work today. on my way home tonight it was dark outside and i had the lights on so of course i went wot and same thing lights went dim. ive also noticed(with old alternator also) that when cruising along at 60-70 mph(2000rpm) the the lights in the guages seem to flicker a little at times. any thoughts?

    thanks in advance.
    Dan

  2. #2
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    Then take the clutched pulley off and install a regular one.
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  3. #3
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    Check all the + & - connections. They need to be clean and tight.
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  4. #4
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    Quote Originally Posted by montyd View Post
    so i thought that my underdrivers were causing my lights to dim at wot. i put a post up here and everyone helped me out and directed me to my alternator. so i called dbelectric and ordered a new one. got it saturday, and threw it on at work today. on my way home tonight it was dark outside and i had the lights on so of course i went wot and same thing lights went dim. ive also noticed(with old alternator also) that when cruising along at 60-70 mph(2000rpm) the the lights in the guages seem to flicker a little at times. any thoughts?

    thanks in advance.
    Dan
    Some tunes shut the alt off at WOT which makes the lights dim till you let up on the accel pedal. Are you sure you are not trying to fix something that is not broken?

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  5. #5
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    This would be a good time for the BIG 3 upgrade!, i also think it would address your problem, i was surprised to see how much corrosion was inside my stock alt charge wire, and battery wires.
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  6. #6
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    big 3 upgrade? the main wire on the alt was extremely clean and the batery terminals are also. ill call brenspeed and ask them if they turn the alt off but that still doesnt explain how the dash and gauge lights flicker a little bit

  7. #7
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    Quote Originally Posted by montyd View Post
    big 3 upgrade? the main wire on the alt was extremely clean and the batery terminals are also. ill call brenspeed and ask them if they turn the alt off but that still doesnt explain how the dash and gauge lights flicker a little bit
    Could be 2 different issues. Check with tune vendor about WOT alt disable to confirm.

    WLB
    BB#1) 1996 ImpalaSS - 16,500 miles - 100% stock
    ______________________________ ___________

    BB#2) 2003 Marauder (300a) - 34k miles - Daily Driver
    #2912 of 7093
    Conceived 8/6/2002
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    Adopted 8/10/2011
    Trilogy 242 - Self Installed 9/9/12 (0-60 5.5 sec)
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    Legacy 600w 6x9 Rears
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    K&N CAI
    Window tint 50% rear/35% front
    FBM CHMSL with Strobe mod 7/1/12
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    Mo's Dyno Tune
    Gorilla Nuts - The System
    Ford Racing 4.10s, 31 spline Cobra carrier & axles 7/1/12
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    CME HP Rear Control Arms & Watts Link 7/1/12
    ______________________________ ________________

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    Ed "Baaad GN" Linthicum 8-6-2014

  8. #8
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    Quote Originally Posted by montyd View Post
    big 3 upgrade? the main wire on the alt was extremely clean and the batery terminals are also. ill call brenspeed and ask them if they turn the alt off but that still doesnt explain how the dash and gauge lights flicker a little bit
    LOL ok good luck bud
    04 MERCURY MARAUDER build date:02/11/04
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  9. #9
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    I also just noticed that along with the dash lights flickering (get bright then dull then bright and so on while cruising) the highlights and dash lights dim when i step on the brake also.

  10. #10
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    Sounds like you've got a "shorting" of a wire somewhere in the car.
    The lights flickering = periodic grounding (shorting out).
    The lights dimming while on the brakes = usually means not enough power from the alternator. Since you've elimiated that issue, it would seem the power off the alternator isn't "getting to where it should be going".

    If I'm off base here...please someone else chime in. Help this guy out! We all know how frustrating an electrical issue can be!!!
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  11. #11
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    Ok, ill start checking the car over for loose wires or grounds. Between this and my rear axle problems im pretty frustrated with the car.

  12. #12
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    Quote Originally Posted by montyd View Post
    Ok, ill start checking the car over for loose wires or grounds. Between this and my rear axle problems im pretty frustrated with the car.
    Frustrating it is... but no thong that can't be fixed.
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  13. #13
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    i know ill get it figured out. i have done nothing but work on the car in the last two months since i bought it, i love driving it. just tired of throwing money at it. im going to vegas for sema show next week so it will probably get put off untill after i get back.

  14. #14
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    Quote Originally Posted by fastblackmerc View Post
    Frustrating it is... but no thong that can't be fixed.
    Not only does the car have an issue, YOU go throwing a thong into the mix.

    But really, you need a DVOM to get some type of an idea of whats going on, and, just because the alternator is "new" that doesn't mean it is good.

    As I said in the last post you put up, specific voltages from a DVOM as opposed to the volt meter in your dash is the only way to determine what is going on.
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  15. #15
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    I thought even from the factory at WOT the alternator disengages (clutch) to make the acceleration faster. I would check the ground wires. You can add an additional ground to the battery, run it to a spot on the frame or body, sand the metal so it is a clean and shiney - making a good contact for new ground wire.
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