Service Hints

I19(A), I20(B), I21(C) INSTRUMENT ECU
(A)21-GROUND : Approx. 12 Volts with ignition SW ACC or ON position
(B) 2-GROUND : Approx. 12 Volts with stop light SW at ON
(C) 1-GROUND : Always approx. 12 Volts
(C) 2-GROUND : Approx. 12 Volts with ignition SW at ON or ST position

S5 STOP LIGHT SW
2-1 : Closed with brake pedal depressed