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ELECTRICAL
Testing
1. Disengage the PTO, set the parking brake, and turn
the ignition to OFF and remove the key.
2. Remove the 4 screws holding the control panel to
the fuel tank.
3. Disconnect the wiring harness from the PTO switch.
4. Press in the locking tabs, on each side of the switch,
and pull the switch out of the control panel.
5. Verify that there is continuity between the appropri-
ate terminals in the ON and OFF positions (Fig.
652).
OFF (IN)
6
not used
6-4
ON (OUT)
Y
Y
Cont.
Cont.
Y
Y
Cont.
Cont.
N
N
Open
Open
N
N
Open
Open
not used
Fig 652
PTO switch test
6. Replace the switch if your test results do not cor-
respond with those given in Fig. PTO switch test.
7. Mount the PTO switch back into the control panel
and reinstall the wiring harness (Fig. 653).
NC
NC
NO
COM
COM
Fig 653
Z580/Z593/Z595 Diesel Service Manual
Grey
NC
NO
Brown
COM
Pink
PTO Clutch switch a
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