Diagnosis & Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1988 Buick LeSabre, 1988 Buick Electra, 1987 Buick LeSabre, 1987 Buick Electra, and 1986 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Break-Out Box (J-35592) and a pressure gauge must be used to diagnose ABS.

Diagnosis of the ABS malfunction involves 3 basic steps which must be followed in order to isolate fault, accurately determine its cause and repair the condition with the least amount of diagnostic time. The proper diagnostic procedure consists of the following steps: PRE-DIAGNOSIS INSPECTION, LIGHT SEQUENCE DETERMINATION and TROUBLE SHOOTING CHARTS.