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Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 21599
Experience:  BEng hons Mech engineering, in auto industry 22 years
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I have a 508sw with all 4 brakes on all the time? Any ideas

Customer Question

Hi I have a 508sw with all 4 brakes on all the time ? Any ideas where to start?
Submitted: 1 year ago.
Category: UK Car
Expert:  Matt replied 1 year ago.


I would suspect that there is a fault either with the master cylinder or the ABS unit

1st try pulling the fuse for the ABS ( located in the underbonnet fusebox) to see if this makes any difference

if this doesn't there may be a bleed nipple on the ABS unit so open that to relieve any pressure, re-tighten and see if the brakes then operate and release

if they do then the issue is with the ABS unit

if this makes no difference then the master cylinder will have to come out for inspection / replacement

Expert:  Matt replied 1 year ago.


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