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Brake and ABS light problem

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Old Dec 25, 2011 | 06:11 PM
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Brake and ABS light problem

My ABS light will not go off.So far I have changed the abs sensor in the rear axle,cleaned the 2 trans sensors.I changed the master and hydroboost because te pedal was losing pressure then getting hard again.ABS stayed off for a couple days after changing the master and hydro but now it is back on and pedal pressure is erratic.Any ideas?
 
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Old Dec 25, 2011 | 11:52 PM
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From: Damon (South East Texas)
Can you get someone nearby to read the codes for you? It would be helpful in pin pointing the problem.
 
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Old Dec 26, 2011 | 12:05 AM
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Sounds strange, but check your alternator to be sure its working properly. The past two times my alternator went out my abs light and brake pedal acted as you describe before failing. After changing alternator all is good, did not touch brakes at all. Just a thought that you might not normally consider.
 
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Old Dec 26, 2011 | 12:17 AM
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From: Damon (South East Texas)
Originally Posted by KJNDIVER
Sounds strange, but check your alternator to be sure its working properly. The past two times my alternator went out my abs light and brake pedal acted as you describe before failing. After changing alternator all is good, did not touch brakes at all. Just a thought that you might not normally consider.
True, Damon. One of the codes that ABS can trip is due to "Low Voltage".
 
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Old Dec 26, 2011 | 03:12 PM
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thanks for the responses,i have AE i got a new computer and cant find my code,i am trying to get them to give it to me,until then i have to wait.I put a voltmeter on the battery after i got home from running errands and driving for about an hour and at idle it was reading 14.3.How can i test the alternator?
 
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Old Dec 26, 2011 | 05:04 PM
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sounds like you just tested it. 14.4 is all the voltage you should get from the alt.
 
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Old Dec 26, 2011 | 05:24 PM
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without having use of AE at the momentis there anything else i can check?
 
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