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ABS Question
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Posted by Darren P. [Email] (more from Darren P.) on Sun, 17 Apr 2016 07:36:12 Share Post by Email
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Have a '93 900T 5-spd. My local independent, Viking Automotive (huge shout out as they are great!!) replaced the ABS "grenade" reservoir with a new correct GM/Delco unit as well as replacing the pressure switch, again with a new correct GM/Delco unit.
Was done to fix the constant ABS/Brake Fluid light's from coming on. So far all is good as no ABS light.
Two new issues...possibly related....

What I am now experiencing is a flicker of the Brake Fluid light periodically. Cleaned the sensor contacts with a wire brush and electronic cleaner as the sensor is the later type built in to the reservoir. Going to give it a few days and see if that helps but wanted to see if anyone has any suggestions. As new reservoirs are NLA from Saab/Orio my indy has a low mileage used reservoir that was sitting for years on their shelf. Thinking is that the sensor is bad as fluid level is spot on and not leaking.

Second issue is that I now hear a more pronounced buzzing from directly in back of the instrument cluster which coincides with the ABS/fluid lights. ONLY happens in the morning or when car has sat for many hours.
Stops when the lights go out so am assuming it is the ABS pump pressurizing the system. Question is that the buzzing was never that loud before....or maybe pump is now working correctly? Conversely, maybe pump is now on its last legs?

Any thoughts would be appreciated!!



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