zagato Posted October 31, 2018 Share Posted October 31, 2018 Guys, I recently replaced the accumulator on my brake system and bled the brakes without issue thanks to input from Hemi. There was a lot of air in the lines, especially from the rear brakes. I no longer have a "hard pedal", but something is not right. The brake pump now runs continually and does not shut off. Could it be the pressure switch? I would appreciate any suggestions. Link to comment Share on other sites More sharing options...
Derekw66 Posted October 31, 2018 Share Posted October 31, 2018 I wish I could help slowing the pump, but be careful with the pump fuse on the right fender well, my 30amp melted through the fusebox and nearly set my car on fire after running for a few mins while bleeding the rear calipers. 1 Link to comment Share on other sites More sharing options...
Hemi Dude Posted October 31, 2018 Share Posted October 31, 2018 3 hours ago, zagato said: Guys, I recently replaced the accumulator on my brake system and bled the brakes without issue thanks to input from Hemi. There was a lot of air in the lines, especially from the rear brakes. I no longer have a "hard pedal", but something is not right. The brake pump now runs continually and does not shut off. Could it be the pressure switch? I would appreciate any suggestions. Yes, it could be the pressure switch. I doubt you have access to the brake pressure gauge shown in the factory shop manual, MST-6163 & adaptor 6244, that would tell you the hydraulic pressure in the system. If a pressure of between 2320 and 2755 lb is not built up, the pump motor will not turn off. REPLACE the pressure switch. Link to comment Share on other sites More sharing options...
zagato Posted November 1, 2018 Author Share Posted November 1, 2018 Hi Hemi, Do you have any idea where I can get the pressure switch? TC parts will only sell to a rebuilder of the entire system. They told me that some GM models used a similar switch, but did not specify which models. Link to comment Share on other sites More sharing options...
Reaper1 Posted November 1, 2018 Share Posted November 1, 2018 It's a Teves III system. The Buick Reatta uses the same system. I think the Ford Thunderbird Turbocoupe also uses a version of it. Link to comment Share on other sites More sharing options...
zagato Posted November 2, 2018 Author Share Posted November 2, 2018 Thanks Reaper Link to comment Share on other sites More sharing options...
Barney Eaton Posted November 25, 2018 Share Posted November 25, 2018 Could be the pressure switch or the relay..........I had a stuck relay and it melted the pump motor. On the Reatta discussion someone found another Teves pressure switch but it had a different electrical plug .....but we don't know what it was for. Any Teves pressure switch will screw in but you need to get the correct electrical connection. Link to comment Share on other sites More sharing options...
Hemi Dude Posted November 26, 2018 Share Posted November 26, 2018 (edited) On 11/1/2018 at 8:44 AM, zagato said: Hi Hemi, Do you have any idea where I can get the pressure switch? TC parts will only sell to a rebuilder of the entire system. They told me that some GM models used a similar switch, but did not specify which models. You may still be able to buy the switch, Chrysler # 4464005 / GM# 25530882. The last time I bought one was in 2001 at a Buick dealer for $82.67 Edited November 27, 2018 by Hemi Dude mis-spelling correction (see edit history) Link to comment Share on other sites More sharing options...
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