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1990 740 ABS diagnosis 700 1992

posted by  grogers on  Fri Jan 19 15:40 CST 2007
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My daughters 1992 740 ABS light started flickering and then remaining on. This happens most of the time the car is started, but not everytime.

I check the surge protector fuse, OK, and the voltages on the relay pins, also OK.
The diagnostics code readout shows nothing.

I have a chiltons book for 1990-1993 and it has a section on measuring various resistences and voltages on the abs control unit. However, the procedure says, for example, to test for ground between 10, 20, 32, and 34. I'm having a hard time doing this since the pins on my ABS CU cable only go up to 28.

Any suggestions? What's going on here?

greg






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