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Chart B5, Abs Lamp Circuits

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  1. The ECBM may turn on the "ANTI-LOCK" lamp for a number of reasons. The Main Relay may also cause the lamp to turn on. This chart concerns continuous operation of the lamp. Intermittent operation is covered elsewhere. See NOTE ON INTERMITTENT and CHART E-2.
  2. "ANTI-LOCK" lamp is powered through the ignition switch with a 20-amp fuse (fuse block No. 16). Lamp is turned on (grounded), if main relay is not enabled by EBCM or EBCM detects fault in system at pin No. 27. A diode protects EBCM pin No. 27 and "ANTI-LOCK" lamp circuit from current overload.
Fig 1: Flow Chart B5, "Anti Lock" Main Relay Circuits
G109721Courtesy of GENERAL MOTOR CO.
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