Question about 1989 Cadillac Eldorado

1 Answer

I have a 1989 Cadilliac El Dorado with the digital dashboard. The brightness suddenly goes dim (perhaps the night setting) or almost blank (could be the dim setting, hard to tell during the day). Can do it several times in a short trip, or not act up for months. Also seems to dim for a second, notice something out of the corner of your eye. Happens with the Twilight Sensor on or off. Sometimes switching the setting helps, but not every time. Seems to act up more frequently in the dim morning light, but then again it happens during the day in bright light. Switching the setting on the mirror seems to have no effect.

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  • colio May 16, 2009

    I will be unable to take it to my service man for several weeks, so I would like to keep this open unless you feel that these two items are the only possibilities. I am sure my local dealer knows what the EEPROM is, but for my benefit, what is it? For a car this old is it a part that can still be found, if needed?

    Thanks for your response

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  • Master
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Hi

I think it’s likely that you have a weak connection in the back of the dashboard where the harness connects to the printed circuit boards in the digital dashboard. Increased humidity most likely exacerbates the problem. The instrument panel will have to be removed and the connectors inspected and cleaned. This would be the first step I would take to attempt to solve your problem.

If the connectors are fine then you'll need to get the EEPROM of your Cadillac checked.

Please do accept this solution and revert for further assistance.

Thanks
Rylee

Posted on May 14, 2009

  • Rylee Smith
    Rylee Smith May 16, 2009

    Hi



    If the wiring harness or patching wires are loose/cut are the most common reasons for the dim dash lights. It may have happened that your wiring harness has completly dried out and needs a complete replacement. First you'll need to look for the wiring harness, iwould not suggest you to invest in a new eeprom unless you get the wiring harness checked.



    Please do accept this solution and revert for further assistance.

    Thanks
    Rylee

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