Tests For Improper Displays (BI92 Displays LO With Headlight Switch Off)

1. Disconnect the connector from the Left Switch Pod.
   • If display reads HI, replace the Left Switch Pod.
   • If display reads LO, go to step  2.
2. Disconnect the BCM. Connect a self powered test lamp at BCM connector terminal 2B11.
   • If test lamp lights, check/repair GRY/BLK (308 wire for a short to ground.
   • If test lamp does not light, check BCM terminal 2B11 for a good, clean connection. If connection is good, replace the BCM.

NOTE: For circuit identification, see Fig 1.

Fig 1: Identifying BI92: Headlights Switch Circuit

Courtesy of GENERAL MOTORS CORP.