Operation CHARM: Car repair manuals for everyone.
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Service Hints

S3 SHIFT LOCK CONTROL SW
5 - GROUND : Approx. 12 volts with the ignition SW at ON position
3 - GROUND : Approx. 12 volts with the brake pedal depressed
1 - GROUND : Always continuity

S4 STOP LIGHT SW
2 - 1 : Closed with the brake pedal depressed