I’m wondering how to use a voltmeter to find a problem in a wiring harness of my car. My passenger headlight turns dim and then turns off after a few seconds. Before that passenger headlight issues arose, my driver side would take multiple flickers to turn on. Also a month ago my car had several accessories running and as I applied the brakes while having the turn signal on, my car did shut off. Seems like there’s a parasitic draw happening somewhere and I am a rookie when it comes to electrical work on vehicles.

I’ve never used a voltmeter besides probing my battery terminals and alternator casing and I’d like to know how to fix my electrical issues in my car before paying a pro to do it. I’m really avoiding to undo any of the wiring harness at it is brittle as can be.

(2001 Lexus IS300)

Thanks in advance

  • mtrbiknut@alien.topBEnglish
    1·
    1 year ago

    You might start by finding and tightening any ground connection you can find. Google, see if you can find a diagram to locate them.

    You are about to learn that electrical problems can be the worst because there are so many possibilities.

    Good luck.