John-deere stx38 User Manual download pdf (Page 93)

3/21/97

4 - 9

ELECTRICAL

TROUBLESHOOTING

TROUBLESHOOTING

Problem or

Symptom

Check or

Solution

Engine will not crank.

Engine cranks but will

not start.

Engine starts hard or

will not stay running.

Engine misses or runs

Weak or no spark.

Engine will not shut off.

PTO clutch will not

engage or will not

Battery goes dead,

discharges or

Optional headlights will

not turn on or will not

Optional fuel shut-off

solenoid will not open.

Optional fuel shut-off

solenoid will not close.

Engine dies when shift

lever is engaged.

Engine dies when PTO

switch is engaged.

See power circuit test points.

● ● ●●●●●●●

See cranking circuit test

points.

●

Check ground circuit test

points.

●● ●● ● ●● ●●

Test battery and connections.

● ●●●● ●

See ignition circuit test

points.

●● ●●●● ● ●●●●●

See charging circuit test

points.

●● ● ●● ●

See starter tests.

●

See PTO circuit test points.

● ● ● ●

See optional headlight circuit

test points.

●

See optional fuel shut-off

solenoid circuit test points.

● ● ● ●

Check for shorted circuit.

●● ● ●● ● ● ●●●●●

Check for high resistance or

open circuit.

●● ● ●● ●●●●●●●

Check for correct spark plug

and spark plug air gap.

● ●●●

Check for correct ignition

module to flywheel magnet air

gap.

● ●●●

Check strength of flywheel

ignition module magnet and/

or flywheel stator magnets.

● ●●● ●●

See fuel and air system tests

and adjustments.

● ●●

Check for stator shorted to

ground.

● ●

Check seat switch is plugged

in and spring inside

connector is good.

● ●

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