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Home >> Cadillac >> 1990 >> Seville Base, 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> BCM Trouble Code Charts >> BCM Code B120: Twilight Delay Pot Circuit >> Note On Intermittents

Note On Intermittents

If intermittent Code B120 is being set, manipulate related wiring while observing BCM parameter BD43. If failure is induced, reading will jump from its normal value to a reading outside the range of 6-94 percent.

Fig 1: BCM Code B120 Circuit Diagram
G90A21741
Fig 2: BCM Code B120 Flow Chart
G90A09270