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Vy electrical issue.

Discussion in 'VY Holden Commodore (2002 - 2004)' started by Joeyrom, Jan 15, 2020.

  1. Joeyrom

    Joeyrom New Member

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    Hi, had a search of the forums and got some ideas of where to start looking. But figured I'd see if there where any other tips specific to my issue.

    Driving the other day I had the battery light on the dash flicker on for a few seconds, I had srs light and traction control off come up. Went away, drive for a few more minutes happened again. No loss of power. Same thing today but this time the stock radio turned off for a few seconds.

    I had the battery voltage reading up on the dash after this happened and the voltage is good, at least when the issue isn't occurring. I have a near brand new battery in there.

    Now, I did have an issue a while ago where one of the tail lights wasn't working correctly, I ended up running another earth cable for it. So I assume this might be a continuation of an earth issue. But figured I'd get some thoughts on what else to check. Also, can you still short out a plug under the steering column to get error codes on the vy?

    Cheers.
     
  2. ant797

    ant797 Active Member

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    Need a aldl cable for a vy $75 on ebay have you cleaned the connections to your battery ?
     
  3. Joeyrom

    Joeyrom New Member

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    I'll be starting to narrow it down this arvo. Starting with cleaning earths. Figured I'd ask for any pointers. Seems it can be anything from earth, alternator, abs, speed sensor, one of the seat cables etc.
     
  4. ant797

    ant797 Active Member

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    yeah better off trying the simple things 1st or a bunch of salesman will jump on and convince you you need this or that and its cheap and mayaswell replace it see how it goes lol...im not sure if these have a bcm but i read a lot of posts with your kind of problems in the vz section and its mostly the bcm or ecu playing up but havnt seen it so much with the vys so proberly something else like an earth as you say
     
  5. Joeyrom

    Joeyrom New Member

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    Cheers for the tip. I'll sand and reseat all the earths and look some other stuff over. Hopefully I can get it to happen while I have the voltage reading up to see if the alternator isn't slowly coking out. Just seems weird that it looks to be a power supply issue but the car drives normally while it happens.
     
  6. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Sounds like one of the earth wires off the battery for the radio to go off..
     
  7. Fu Manchu

    Fu Manchu Well-Known Member

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    Those systems will be shut down by the computer when charge is low. This will trigger the warnings you saw.

    I'd guess that the alternator is buggered.
     
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  8. Joeyrom

    Joeyrom New Member

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    I figured the car would have stalled or spluttered if that was the case. But I just cleaned the contacts and the issue is still there. I didn't catch what other lights came up, but the battery light did flicker a few times on the 7 minute drive home. I think I may just take it to be diagnosed and make a decision. Don't really want to go on a wild goose chase.
     
  9. Joeyrom

    Joeyrom New Member

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    Oh, forgot to add. I managed to have the voltage reading up when it happened, it was at 13.8/13.9 with air con on. Relatively stable at 14 with air con off.
     
  10. ant797

    ant797 Active Member

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    You can test the alternator
     
  11. ant797

    ant797 Active Member

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    Did you try revving it see if it goes too high overcharging regulator should keep it consistent
     
  12. Joeyrom

    Joeyrom New Member

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    Yeah, tried it. It touches 14.1 seems the regulator is fine. I'm just hoping it's not the computer or something major. I was thinking speed sensor or something knocking about, but I pulled over when it first happened and was still getting the flickering battery light. It might be a hard thing to test, but from the few times it's happened it may only happen after the car has warmed up.
     
  13. Joeyrom

    Joeyrom New Member

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    It doesn't last very long. Comes and goes in the space of a 3 to 5 seconds. The lights and warnings aren't consistently on. It's all flicker.
     
  14. Fu Manchu

    Fu Manchu Well-Known Member

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    The car won't splutter.
    It's a protective part of the cars programming when voltage gets low to isolate systems using power and redirect it to provide essential operation of the engine.

    I'm betting this comes down to battery or alternator.

    Both should be load tested.
     
  15. Joeyrom

    Joeyrom New Member

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    Sorry, the splutter comment was to the other guy about the loose cable. I used the onboard battery voltage reading and it gave good results even during when the lights were coming on in the dash. It does make sense that it would be a battery/alternator issue though as thats the first light to come on and last to go off, sometimes the only one. Maybe I should hook up a multimeter direct rather than use the onboard voltage reading.
     
  16. Fu Manchu

    Fu Manchu Well-Known Member

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    I recently had an issue with mine. I used a multimeter to test the voltage and it seemed fine. However when my trusted mechanic load tested it, it failed. New battery and problem fixed.

    The VE used to always get a flat battery back when we bought it.
    Holden did a software update on the charging system and fixed the problem.

    Many years later, the alternator failed and the same traction control, ABS warnings etc came up because the cars computer was isolating systems not essential to keep the car running.
     
  17. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Sounds like a regulator starting to break down when it warms up.. Change it see how you go..
     
  18. Joeyrom

    Joeyrom New Member

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    I'm just not seeing how the voltage is the issue if its showing correct voltage when the issue happens. I'd assume there'd be a dip. But I'll do another test run and take it in to get diagnosed and update the thread for anyone else looking.
     
  19. Joeyrom

    Joeyrom New Member

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    Little update. Didnt have anything light up on the way to work but the voltage did drop down to 13.1 while waiting at some lights and then again at another set. While parking up at work I pumped the air con and turned the high beams on and she dropped to 12.8. While driving it was a solid 13.8/13.9. I'll probably throw a new alternator on and see what happens.
     
  20. ant797

    ant797 Active Member

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    you might be able to get away with just replacing the regulator on the alternator if its replaceable be a fraction of the price
     
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