7 Electrical System Service
Troubleshooting Charts
7 - 28
Component Tests OK
Check all wires and
connections.
Refer to A. Check/Clean
Wires and Connectors.
Replace components as
required.
Component Tests OK
Component
Fails Test
Check the ignition switch. Refer to H. Ignition Switch
Tests.
Replace the ignition
switch.
Component Tests OK
Component
Fails Test
Check the PTO switch. Refer to I. PTO Switch Test. Replace the PTO switch.
Component Tests OK
Component
Fails Test
Check the brake pedal
switch.
Refer to M. Brake Pedal
Switch Tests.
Replace the brake pedal
switch.
Component Tests OK
Component
Fails Test
Check preheat timer. Refer to F. Preheat Timer
Test.
Replace the preheat
timer.
Component Tests OK
Component
Fails Test
Engine will turn over but will not start: (Diesel Models)
Check glow plug relay. Refer to G. Glow Plug Relay
Test.
Replace the glow plug
relay.
Component
Fails Test
Check the seat switch. Refer to O. Seat Switch
Test.
Replace the seat switch.
Component Tests OK
Component
Fails Test
Done
Check the engine ignition
system.
Refer to Engine Manual. Replace components as
required.
Component
Fails Test
Check the ignition switch. Refer to H. Ignition Switch
Tests.
Replace the ignition
switch.
Component Tests OK
Component
Fails Test
Check the fuel system. Refer to Engine Manual. Replace components as
required.
Done
Component
Fails Test
Engine runs for a few seconds then dies: (Diesel Models)