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Electrical... Here we go!

Discussion in 'E31 (1991-1997)' started by wbmunroe, Apr 26, 2015.

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    Since picking this vehicle up a few weeks ago, the gauges (Temp, Speedo, Odo, and Fuel) have been dancing and/or just shutting down. There's no power loss, the main computer still operates and shows speed, DTE, etc...

    The previous owner mentioned something about a module (Body Control Modul?), and that may be the culprit. I'm not sure where to look for this, and can't find the location on REAL OEM. There is a spot behind the driver seat in the C pillar that has some sort of small black box, but I cannot find any description about what it is.

    Does this sound correct? Would the BCM control the instruments?
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    The general module is behind the glove box in bracket with other modules. Yes it can cause issues with some gauges. I have heard of this before but not sure I have ever heard of anyone knowing the proper fix. I would start by checking all instrument cluster connections and grounds make sure they are tight.

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