Jump to content

2005 LS430 Possible Alternator Problem.

Recommended Posts

Howdy. The voltage in normal running has been slowly dropping over the last few months from about 14.3, now down to about 13.3 to 13.5 volts. Turning lights on and loading it up makes no difference.  Battery voltage when not running is normal. It still has about 14.2 when first started, but drops as it warms up. Might this be the regulator on its way out, and can that be replaced, or is it likely the alternator itself is getting a bit ancient, like its owner? Is the regulator built-in to the alternator, or is it separate? Is it likely to completely clap out any time soon? How easy, or difficult, is it to replace? I haven't noticed any strange noises from it.

Cheers, Keith.

Link to comment
Share on other sites

Are you checking the charge rate at the battery with a voltmeter, if so it should be 13.9 to 14.2 with the car running, how old is the battery?? I've never changed one on a LS but it might be on utube let us know good luck.

Link to comment
Share on other sites

Hi 2Bling. I have a small voltmeter "permanently" attached from the fuse box under the dash, by the driver's legs. Been there since I got the car a few years ago, so I have a pretty good idea of what's normal for the car. It reads the same as going directly onto the battery. The battery is 4 years old, but appears to be okay. Obviously it's not going to have quite the capacity of a new one, but it still turns over fast, and starts fine. I guess I'll just keep a close eye on it,.and see how things go.  Cheers.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Join The Club

    Lexus Owners' Club Australia is an Independent Lexus Owners Club.
    Join our Australian LOC community. It's FREE!

  • Latest Member Posts

    1. 0

      Speed Camera Alert not working

    2. 0

      New member introduction

    3. 0

      Log Book Service

  • Create New...