Digital instrument panel troubles

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Electrical Technical Information Discussion, Digital instrument panel troubles in Item Specific Cadillac Discussion; I have a '91 El Dorado. on a recent trip my digital speedometer panel went out, now I have no ...
  1. #1
    granerboob is offline Cadillac Owners Member
    Automobile(s): 1991 eldorado
    Join Date
    Oct 2012

    Digital instrument panel troubles

    I have a '91 El Dorado. on a recent trip my digital speedometer panel went out, now I have no speed, gas gauge or mileage. At dark with the headlights on the speedo comes on very, very dim. I've checked the fuse panel, all are good. The manual says there is another next to the instrument panel but shows no further location or picture. Any Idea how to get it lit back up of how to find the other fuses?

  2. Remove Advertisements

  3. #2
    carnut is offline Cadillac Owners Master
    Automobile(s): 1999 BMW 740 Il. 2005 Jag XK8, 1988 Mercedes Benz 300 SE
    Join Date
    Feb 2003

    Re: Digital instrument panel troubles

    This car used a module about the size of a pack of cigarettes mounted vertically above the gas pedal on a bracket retained by 2 10mm nuts. Called a central power supply. That module provided the dash illumination. There were at least 2 updates to these because the solder connections would crack over the years. Remove it and let it dangle by the harness plugged into it. Start the car and slap the module with your hand. If the cluster lights up at all, replace it. If I recall the decal on it says CENTRAL POWER SUPPLY. I think it was used from 86 thru about 91. The only other item could be the BCM ( body control module) usually shorted by improper aftermarket stereo installation!

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts