Service Manual

6-21Z Master 597 Diesel Series Service Manual

ELECTRICAL

1. Disengage the PTO, set the parking brake, turn

the ignition key to OFF, and remove the key.

2. Loosen 4 bolts and remove the rear bumper

plate.

3. Disconnect the PTO clutch harness from the

main harness.

4. Set the multimeter to check amps (10 amp

scale).

5. Connect the positive meter lead to terminal (1)

of the main harness (Fig. 381).

Measuring Clutch Current Draw

Fig 381 diag 3-7

6. Connect the negative meter lead to the clutch

harness terminal (3), Fig. 381.

8. Turn the ignition switch to the “RUN” position.

Turn the PTO switch to the “ON” position.

9. If the meter reading is 3.5 amps or above, the

system is functioning properly. If the meter

reading is below 3.5 amps, check the electrical

system for problems (i.e., the battery, ignition

switch. PTO switch, or wiring harness). Make

sure the negative side of the wiring has a good

connection to chassis ground.

Fig 382 diag 3-7

7. Connect a short jumper lead from terminal (2) to

terminal (4) (Fig. 382).