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Unknown component

Discussion in 'General Electronics Discussion' started by Jeff Sweeney, Jan 31, 2018.

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  1. Jeff Sweeney

    Jeff Sweeney

    Jan 31, 2018
    Can anyone tell me what this component is and what the print on it refers to? It came from 1980 camaro buzzer/lighting circuit.
    At first I thought is was some type of a thermal fuse but now I'm no so sure. Here is what's printed on it.

    L1 KS
    N squared

    Attached Files:

  2. Kabelsalat


    Jul 5, 2011
    I would have guessed a diode of some sort - have you tried to measured it?

    Do you still have the original circuit board where it came from?
  3. davenn

    davenn Moderator

    Sep 5, 2009
    Hi Jeff

    a thermal fuse would have been my guess as well ... either that or possibly a capacitor
    can you please show a photo of the circuit where it came from and where in the circuit it was
  4. kellys_eye


    Jun 25, 2010
    If from a 'buzzing' circuit is likely to be a suppression capacitor (across the buzzer). They don't usually go 'wrong' so what's the actual problem?
    HellasTechn likes this.
  5. shrtrnd


    Jan 15, 2010
    Most US car manufacturers have the electronic parts installed in their vehicles custom-marked with their own numbering system, probably to discourage people like us from repairing the devices ourselves instead of buying the manufacturer's replacement parts. My vote is with davenn & Kellys_eye. That sure looks like a lot of the capacitors I see in a lot of gear. It doesn't physically look stressed, although it might still be damaged. Are you pretty sure that's the problem with your device, it could be something else.
    When manufacturers custom-mark electronic parts in their cars, people here usually refer to the practice as 'house'-numbering of them. I've always heard the practice referred to as 'proprietary' part numbering.
    The number you see on your device is most probably owned by GM, which had the part manufacturer stamp their own proprietary part number on it. (And hides that information from the public).
    davenn is a pretty sharp individual. If he says it might be a thermal fuse, it could be.
    Can you tell us a little bit more about your buzzer/lighting circuit? Just from the title of the circuit, the thermal fuse option makes a lot more sense, but I don't know the complexity of the circuit you're looking at.
    If you don't get a definitive answer here, I'd Google the buzzer/lighting fault on your vehicle model, and see what other people might have posted about a similar problem.
  6. kellys_eye


    Jun 25, 2010
    I've never come across 'hidden' fuses of any kind in a motor vehicle - this could be a first but given the age (1980) I very much doubt it.
  7. Jeff Sweeney

    Jeff Sweeney

    Jan 31, 2018
    When I measure I'm getting no continuity and zero volts across. I've attached 2 pictures of the board it came off of, I've circled where is was connected on the backside. On the front it's hidden under the buzzer.

    Attached Files:

  8. kellys_eye


    Jun 25, 2010
    Brilliant photo.....:rolleyes: the topside location of which is covered by that metal disk.....

    Still, it is very likely to be a capacitor - you won't measure anything across it using a standard test meter either. It is probably NOT faulty though.

    The circuit seems to be a simple oscillator being used to drive the sounder (the disk being the active sound-making element).

    What, precisely, is the fault?
  9. HellasTechn


    Apr 14, 2013
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