1993 Allante speedometer problem
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Cadillac Allante Forum Discussion, 1993 Allante speedometer problem in Past Cadillac Vehicle Discussion; Hello Guys--- Have a 93 Allante with analog instruments. Battery went bad during the winter-60 months exact--tried to start---I think ...
  1. #1
    giants1954 is offline Cadillac Owners Member
    Automobile(s): allante
    Join Date
    May 2011
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    1993 Allante speedometer problem

    Hello Guys---

    Have a 93 Allante with analog instruments. Battery went bad during the winter-60 months exact--tried to start---I think low voltage caused a problem with the speedometer--it went from 0-140 MPH and pegged itself and has stayed there.
    Replaced the battery--everything seems to work perfect--but the speedo is pegged and does not move--ignition on or off.

    Hopeing the wisdom of the group can help.---Ray


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  3. #2
    D Yaros's Avatar
    D Yaros is offline Cadillac Owners Fanatic
    Automobile(s): 1955 CDV, 1992 Allante, 1962 Olds 88 Conv
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    Re: 1993 Allante speedometer problem

    I am having a little trouble wrapping my head around this one. If it is an analog dash, the speedo should be mechanical, not electrical. I cannot comprehend how changing the battery here would case the needle to peg out at 140 MPH? May sound dumb, but have you tried tapping on the speedometer cluster?

  4. #3
    giants1954 is offline Cadillac Owners Member
    Automobile(s): allante
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    Thread Starter

    Re: 1993 Allante speedometer problem

    An electrical pulse sending unit at the tranny sens pulses to the speedo. Yes--I tried tapping on the cluster to no avail. But--we all get lucky once in a while. I decided to do another road test and try the cruise control for confirmation of failure. I didn't expect it to work but nothing ventured? Set up at aprox 40 MPH and voilla--the cruise engaged-but still 155 MPH on the speedo. Decided to accelerate the cruise to see what happens? At about 55 MPH--the speedo suddenly dropped to 55 MPH and has acted normally the rest of the test drive. Did a shut down -and started up-all good! Thanks so much for just offering an idea----Ray

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  6. #4
    D Yaros's Avatar
    D Yaros is offline Cadillac Owners Fanatic
    Automobile(s): 1955 CDV, 1992 Allante, 1962 Olds 88 Conv
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    Re: 1993 Allante speedometer problem

    Glad you found a solution. Great improvisation/thinking on your part!

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