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Ignition switch is driving me crazy

Discussion in 'Sparky's corner' started by Cutlass, May 1, 2023.

  1. Cutlass

    Cutlass Platinum Level Contributor

    While installing my new Retrosound radio I found out, that the yellow wire for the radio does not show 12V in ACC-position, only in Run-position.
    I tried to adjust the position of the switch, but w/o luck.
    So I disassembled the switch to see whats going on inside.
    Here are the pics showing the position of the keys in Lock-, ACC.-, Run- and Start-Position.
    I do not see how the ACC. position can work at all. The other positions make sense to me.
    Am I confused, or are there different versions of ignition switches available?
    Need your help to shed some light on this.
    THX
    IMG_4526.JPG IMG_4524.JPG
    Lock:
    IMG_4516.JPG IMG_4517_mod.jpg
    ACC.:
    IMG_4518.JPG IMG_4519.JPG
    RUN:
    IMG_4520.JPG IMG_4521.JPG
    Start:
    IMG_4522.JPG IMG_4523.JPG
     
  2. CJay

    CJay Supercar owner Staff Member

    The radio should work in the accessory position. If you manually put the switch in accessory, you have no power to that spade?
     
  3. CJay

    CJay Supercar owner Staff Member

    So the #10 brown wire off the accessory spade should power the radio. If you have a power probe, you can supply the brown wire with 12v and see if the radio turn on. That will test the curcuit
     
  4. Cutlass

    Cutlass Platinum Level Contributor

    Thanks, I used a ohmmeter at the terminals of the switch to check if battery and acc terminals are connected when in ACC position. Thats why I opened the switch. What is confusing to me, is that mechanicaly there is no connection inside the switch. Either I am wrong, or the switch :). Nevertheless, as the contacts inside the switch show some wear, I decided to order a new one from Rockauto. Should be arriving at my doorstep latest in one week.
     
  5. Cutlass

    Cutlass Platinum Level Contributor

    First: Rockauto rocks! Ordered the switch on Monday this week and it arrived today.

    Second: Where can I get the application for fool of the months?
    I checked the new switch with my ohmmeter and oh sh... the same behaviour as the old one. Fortunately the new switch came with a manual and a illustration of the different modes of the switch.
    Turns out that even after almost 5 years of driving the Buick I was to stupid to know where the ACC position of the ignition lock is. I found it out tonight :). Here is my excuse (believe it or not): The cars I know here in Europe have a different setup. From Lock clockwise you get to ACC and from there to On and then to Start. So I didn't think for a second that in my Buick I would have to go counterclockwise past Lock to get to ACC.
    Mystery solved and the Buick has a new ignition switch for reliable operation for many years to come.
     
    Mark Demko likes this.

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