Case 580SR Service Manual page 1008

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8.9 4WD SWITCH
Test procedure
Switch OFF
From pin 7
to pin 5
From pin 6
to pin 8
Voltage:
Ignition ON:
8.10 BRAKE PEDAL SWITCHES
Test Procedure
Continuity:
Brakes not applied: no continuity.
Brakes applied: continuity, between the two centre
pins of each switch.
Both brake pedals must be applied to allow 12 V to
relay.
Voltage:
Left switch:
White / red wire
Red wire
Right switch:
Red wire
Red - Black wire
SECTION 55 - ELECTRICAL SYSTEM
Continuity
Position 1 Position 2
From pin 5 From pin 1
to pin 3 to pin 3
From pin 4 From pin 2
to pin 6 to pin 4
Pin 3 = 12 V
Pin 6 = 9 V
12 V continuous with ignition
ON
12 V pedal depressed
0 V pedal released
12 V pedal depressed
0 V pedal released
12 V pedal depressed
0 V pedal released
1: R:1
2: R-N:1
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F28417
F28419
1: R:1
2: B/R:1
F28420