RELAY CODERELAY USEAExterior Lamp Failure Monitoring UnitBCombination Relay (Turn Signal, Hazard Lamp, Wiper/Washer)CHigh Speed Relay (Auxiliary Fan)DLow Speed Relay (Auxiliary Fan)E2Air Pump Clutch (Electronic Engine Controls/Air Injection Management)FHeadlamp Washer Relay (Headlamp Wiper/Washer)GPower Seat Diode (Power Seats)HPower Seat RelayIPower Window Relay (Power Windows)KAuxiliary Fuse Holder (Anti-theft Alarm System) Mercy 420-SEL 1991 Main Engine Fuse Panel/Board – …