Chart E2, Abs Lamp Dim

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This chart deals with dim or no operation of "Anti-Lock" lamp during engine cranking. During cranking the lamp should ground through disengaged main relay.
Failure to turn on during cranking may indicate an open in lamp wiring, an open in main relay ground circuit through pin No. 3, or an open anti-lock diode. This condition could prevent the "ANTI-LOCK" lamp from turning on during an anti-lock failure.

Fig 1: Flow Chart E-2, "Anti-Lock" Lamp Dim

Courtesy of GENERAL MOTOR CO.

Fig 2: Chart E2, ABS Lamp Dim