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Thread: A question for the sparkies

  1. #1
    Join Date
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    A question for the sparkies

    For a couple of years I've been having trouble with the interior light on the old Corolla. It would work OK when switched on, but only intermittently on the door setting when the doors were opened. Boot light and dash light worked fine.

    I finally decided to pull it out today and found a couple of the riveted contacts were loose. A whack with a punch and drift tightened them up and all is now working to spec.

    However in times past someone has modded the wiring and soldered a capacitor and resistor between the positive and negative wires of the door light wiring.

    So my question to the auto sparkie experts is why would this have been done and what would the effect be?

    Was it done to add a load the the circuit perhaps?

    Cheers

    Steve

  2. #2
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    A capacitor stores voltage for period and then releases it, so it would seem that the previous owner wanted to delay the dome light either coming on or turning off.

  3. #3
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    Thanks Jode

    Yep that makes perfect sense except there is no delay either way and its a pretty small cap.

    Still a mystery...

  4. #4
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    Try bypassing it to see what effect (if any) the bits provide. If none then it may be wise just to take the things out (less to go wrong).

  5. #5
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    Quote Originally Posted by Rok_Dr View Post
    Thanks Jode

    Yep that makes perfect sense except there is no delay either way and its a pretty small cap.

    Still a mystery...
    Small value capacitors across the supply are used to stop the click or static in a radio when points or contacts are operated.
    .

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