Brake noise????

the-big-e

Registered User
I have an 89 SC with ABS.

I am getting a chattering / buzzing noise right at the brake pedal.

It only happens when my speed drops below 20 MPH and stops when I get below 10 MPH.

The pedal pressure drops somewhat when this happens.

This is a real distraction when coming up behind someone at a stop light.
 
Sounds a whole lot like the ABS is engaging. Question is why? It is sensing a lockup..

Do this.. under the hood on the passenger side firewall, there are 2 or 3 relays.. they are box looking things sitting under a bundle of wires behind the EEC test case. pull out the one just to the left of the brown one.. leave the brown relay in place. Try it out.. if you have no power brakes, stop and put the relay back in and pull out the other one. Then see how it does. This disables power to the ABS computer and hence the ABS will stop.
 
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