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Thread: Cruise Control Brake Pedal Cut Off Switch

  1. #1
    Join Date
    May 2018
    Location
    Pittsburgh
    Posts
    1
    My Cars
    635CSi

    Cruise Control Brake Pedal Cut Off Switch

    Folks... brand new to this site, so any help is appreciated, I have an '87 635CSi (auto) and have discovered and suspect that at one time the cruise control for a previous owner stopped working. That owner was unable to locate a replacement "cruise cut off switch" and removed the original part and thereby disabled the cc. This switch has two leads and a vacuum hose port.... so any help on locating this would be welcome.

  2. #2
    Join Date
    Feb 2009
    Location
    Pittsburgh, PA
    Posts
    1,718
    My Cars
    '86 635CSi, '08 128i
    Quote Originally Posted by 635convert View Post
    Folks... brand new to this site, so any help is appreciated, I have an '87 635CSi (auto) and have discovered and suspect that at one time the cruise control for a previous owner stopped working. That owner was unable to locate a replacement "cruise cut off switch" and removed the original part and thereby disabled the cc. This switch has two leads and a vacuum hose port.... so any help on locating this would be welcome.
    Not sure how I missed your post, but I'll kick it back to life. It's an easy fix for the automatic, since the cruise cut-off is actually the brake light switch. It just cuts power to the CC computer to reset the unit & disable cruise control. The vac hose & harness you're seeing is something different, I'd bet it's the interior air temp sensor in the lower dash kick panel. That unit has both a vac hose and a small 3-pin white inline plug. If it's missing it can cause your A/C to be 'on the fritz' too.
    Save the manuals!
    '08 128i 6MT, '86 635CSi 5MT (B32, Motronic 1.3, WBO2, G265, 18# FW, 3.46 torsen)
    Past projects:
    '96 318iS, sold 4/23 '90 535iM, RIP 1/23 '90 535iA RIP 6/22 '91 318i, sold 7/19 '97 M3 sedan, sold 11/18 '85 735i, RIP 2/18 '92 325iC, sold 7/16 '91 318iS, sold 6/16 '84 745i, sold 10/14 '82 633CSi, traded 9/12 '90 325i, RIP '87 325 sold '89 525i, traded '87 325iS, RIP

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