1990 allante brake booster

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Cadillac Allante Forum Discussion, 1990 allante brake booster in Past Cadillac Vehicle Discussion; Brake booster, do any other models fit on the allante?...
  1. #1
    90 allante is offline Cadillac Owners Member
    Automobile(s): 1990 allante
    Join Date
    Jan 2013

    1990 allante brake booster

    Brake booster, do any other models fit on the allante?

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  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: 1990 allante brake booster

    There is no booster per SE. It has an electric hydraulic booster pump. Each time the car is started this pump activates to raise the pressure in the system. That pump is activated electrically thru a relay mounted in behind the radiator overflow tank on the inner fender edge. That relay can fail. That pump is shared with late 80's Chrysler rear wheel drive cars. You must swap over the wiring plug to make it work. Have you read the tutorial on www.allantesource.com to confirm what's wrong?

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