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ABS "anti-lock" light is on, need help

 
Old 07-22-2001, 09:31 PM
  #1  
Mika Renwall
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Hello everyone! My anti-lock warning light started to glow and i was wondering if there is a way to diagnose the abs system likewise engine codes and FX3 suspension.
The warning light is off when i start my car, but when i get going it comes on
I have checked all fuses are ok. There is no modulator valve test humming sound anymore. I have fotocopied some parts of the -89 service manual book (havenīt bought it because it costs about 200$ here), but the brakes section is missing. What are the most likely points that i should check to get it fixed.
Mika
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Old 07-22-2001, 11:28 PM
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jfb
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Good GM dealers have a wheel sensor tester which is most likely the cause of your ABS light. I measured the inductance and Q of my wheel sensors and one had a Q of about 1/2 the others. My mechanic had access to a GM wheel ABS tester and it indicated a defective wheel sensor. First check your wheel sensor star wheels for dirt and magnetic debris. If ok, find someone with an impedance bridge and measure the inductance and Q of each wheel sensor which should tell you if they are ok. Its been several years since I repaired my ABS, so I cannot tell you what my impedance bridge measurements were. Good Luck.
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Old 07-23-2001, 12:15 AM
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vettenuts
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Mika, do a search on this subject. I recently typed in the procedure for pulling and diagnosing the codes. The simple answer is "yes", you can pull the codes from the ABS computer. If you can't find the discussion that has the information, I will gladly re-type it.

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Old 07-23-2001, 05:35 AM
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Mika Renwall
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Thank you kindly for the info so far. Iīll go and do some testing. And vettenuts, no i didnīt find your post concerning this issue, so i would appreciate if you e-mailed it to me or posted it here again. And one thing i didīn remember to mention was that my vette is a -89.
Thanks ! Mika
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Old 07-23-2001, 08:31 AM
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ToniH
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Here is the link: http://www.corvetteforum.cc/ubb/Foru...ML/008786.html

I have the same problem but haven't tried to diagnose it yet. It is weird I don't get the light every day.

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Old 07-26-2001, 09:44 AM
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Mika Renwall
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Thanks Toni and others, now i found the link and got the codes.
Greets, Mika
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Old 07-26-2001, 09:50 AM
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Shawn93PoloConv
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Let us know what happens. I had the ABS light come on when I breaked heavily. In my case, the pads were done and I needed front brakes. After the brake job, no more lights.

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