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Home >> Cadillac >> 1989 >> Seville Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DFI BCM Tests W/Codes >> Multiple Intermittent Codes >> Code B420 - Courtesy Light Relay Circuit >> Notes On Intermittents
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Notes On Intermittents

If an intermittent code B420 is being set, manipulate related wiring in output function and watch for relays to cycle.

Fig 1: Flow Chart, BCM Code B420, Courtesy Light Relay Circuit
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