John-deere stx38 User Manual download pdf (Page 112)

4 - 28

3/21/97

CIRCUIT OPERATION AND DIAGNOSIS

ELECTRICAL

CRANKING CIRCUIT DIAGNOSIS

STX30 & STX38 (SN —210000)

Test Conditions:

• Transaxle in neutral • Key switch in run position

• Park brake engaged • Meter negative (-) lead on battery negative (-)

terminal

• PTO switch disengaged • Meter positive (+) lead on numbered test point

Test/Check Point Normal If Not Normal

1. Battery positive terminal. 11.8—13.2 Test battery.

2. Key switch terminal B. Battery voltage Check battery cable connection,

fusible link or circuit breaker and

210/201 red wire.

3. Key switch terminal A. Battery voltage Replace key switch.

4. PTO switch yellow wire. Battery voltage Test 510 yellow wire.

5. PTO switch purple wire. Battery voltage Replace PTO switch.

6. Neutral start switch 720 pur

wire.

Battery voltage Test purple wire.

7. Neutral start switch 710 pur

wire.

Battery voltage Replace neutral start switch.

8. Key switch terminal S1. Battery voltage Test purple wire.

Test Conditions:

• Key switch in start position

Test/Check Point Normal If Not Normal

9. Key switch terminal S2. Battery voltage Replace key switch.

10. Starter solenoid terminal S. Battery voltage Test purple wire.

11. Starter solenoid ground

terminal.

Greater than 0—less than 0.2 volts. Greater than 0.2 volts—check

starter solenoid ground circuit and

130 Blk wire.

0.0 volts—Replace starter solenoid.

12. Starting motor Battery voltage Check red wire, if OK test starting

motor.

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 313 314

No comments

John-deere stx38 User Manual Page 112