LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 1989 >> Reatta >> Repair and Diagnosis >> Engine Performance >> System >> 3.8L BCM Tests W/Codes >> Self-Diagnostics >> Code B420, Twilight Light Relay Circuits (TORONADO) >> Note On Intermittents
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Note On Intermittents

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

Fig 1: Code B420, Flow Chart Twilight Light Relay Circuits (Toronado)
G111494
scientia non olet · About LEMON Manuals