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OBC back light stays on with ign off?

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    #1

    OBC back light stays on with ign off?

    1984 325e with 13 button OBC.

    Car was stolen several years ago and the steering column wiring all ripped up all for the purpose of stealing a $500 stereo. People like than need to get their right hand cut off or something. Anyway,

    Because of these and other problems I ended up with it and I'm trying to piece it together.

    I have replaced the ign lock and the stalk switches and the OBC backlight (which was burned out...not the thieves fault).

    I've gotten most things back up but am having problem with the OBC backlight.

    it wants to stay on with the power off. The wiring diagrams say this should not be. Fuse 12, which feeds the OBC, is supposed to get juice only with the key in an on position.

    now, I replaced the ign lock with one from ebay and reused the ign switch (round brown thing with pigtail) that I had been operating with a stubby screwdriver.

    Could this mistreated ign switch be the bad actor here? The only damage I can see is a slight widening of the slot that fits up to the lock. It is not cracked or broken in any way I can see.

    the backlight goes "off" if I turn on the headlights, but by turning the reostat I can bring it back up again to a "dimmer than it would be in broad daylight but on and visible at night" condition.
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    #2
    Mine did that just today. I gave it a good hard smack like I do when it has a seizure and it fixed itself.

    S54B32 swap in progress. Status: Getting There

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      #3
      Want to bump this, I've got an OBC that stays on, no history of the car being stolen, but poorly removed DIY stereo wiring. And, random parts of the factory radio harness are there but taped off. Any ideas on things to check? Its not an issue usually, but if left more than a few days I'm starting to get battery drain.

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        #4
        ^^ I'm in the exact same position...

        Lights staying on after a poor stereo install.

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          #5
          Funny that mine doesn't light up with the key off, but if you look real close, you can see that it is still doing "stuff". I'm going 13 button but need all the wiring to do it. I have the comp.

          John
          The Revolution will not be televised.

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            #6
            Mine stays on, too. And my stereo comes on sometimes. blah, blah, blah. ready to take a hammer to this damn car. Just spent ten days working on a 1965 toyota landcruiser and remembered how nice and simple things can be. Anyone got an FJ40 they want to trade for 88 325ic??

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              #7
              My OBC is dim as dim as a a _____

              Also I set the date fine, the time though it wont let me.

              And sometimes after pressing a certain button my screen just shows random characters all constantly changing

              6 button OBC

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