My 2005 Lexus ls 430's driver side door no longer responds to locking or unlocking. All the other doors are fine. Thanks in advance my 2005 Lexus ls 430's driver side door no longer responds to locking or unlocking. All the other doors are fine. Thanks in advance

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06 Jul, 2012

  • 72%
    Solved this issue
  • 99min
    Time to fix
  • 70%
    Recommend to DIY
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I'm assuming that they're power locks on a Lexus. It sounds like a possible bad switch, dirty contacts inside the switch or simply loose connector. You can disconnect, then remove the switch and test it for continuity with a multimeter. Set the multimeter on the resistance setting (the ohms symbol, like an upside down horseshoe). It doesn't matter which one, so long as it's one of the resistance settings and you can NOT have it connected to ANYTHING on the vehicle (very important). After you remove it, if you close the contacts (by pressing the button) and you get 0 resistance then it's not the switch and may be somewhere else within the circuit. You should be able to call your dealership parts/repair dept. and they will tell you which contacts in particular to test, being as there will be multiple ones. Or do trial and error. You could also look it up online. I found the switch here (http://www.lexuspartsnow.com/parts/lexus-switch-sub-assy-door-un-lock~84903-50040.html) for $9. Let me know if this helps or you need other suggestions. There is also a relay within the circuit that may be bad.
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