Abs and trac control light on

TonyC

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Just bought a 97 grand am se. The abs and traction control light are on. I went to auto zonE and got a code reader. It didn't show any issues. Any one know how I can figure out how to diagnose the problem? Also when I was in the trunk the light was disconnected. When I re connected it to the first connection all the doors unlocked. I disconnected it and tried the other connection and it worked. Any one know what this connector might go to? Thanks in advance
 
a ECM reader will not give you ABS system readings. You can try a ohm meter and check each wheel sensor to find the one that is bad. The connector may be for an option you dont have, is anything else not working?
 
Everything else seems to work. With ohms what should my reading be
 
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