ELECTRICAL
4181383 First Edition 4-49
4
Run Circuit
Symptom: Engine stops running when the park brake is released.
Raise/Lower Circuit
Symptom: Lower solenoid does not energize.
Probable Cause Remedy
Faulty seat switch. With the seat cushion depressed, check control module seat sw input LED. If the LED
does not light test the seat switch.
Faulty switched power circuit. Measure voltage between seat switch Org/Pnk wire terminal and ground. Voltage must be
approximately 12 VDC.
Faulty 12V fuel solenoid output circuit. With the key switch in the start position, measure voltage between the control module fuel
solenoid output terminal and ground. Voltage must be approximately 12 VDC.
Faulty control module. Substitute the control module with a known good control module.
Probable Cause Remedy
Faulty raise/lower switch. With the raise/lower switch in the lower position, check control module joystick lower sw
LED. If the LED does not light, test the switch. (See “Raise/Lower Switch Test” on
page 4-59.)
Faulty switched power circuit. Measure voltage between raise/lower switch org/pnk terminals and ground. Voltage must
be approximately 12 VDC.
Faulty lower switch input circuit. With the raise/lower switch in the lower position, measure voltage between control
module joystick lower sw input terminal and ground. Voltage must be approximately 12
VDC.
Faulty control module output circuit With the raise/lower switch in the lower position, check control module lower sol output
LED. If the LED does not light, substitute the control module with a known good control
module.
Faulty lower solenoid output circuit. Momentarily place the raise/lower switch in the lower position.
Measure voltage between control module lower solenoid output terminal and ground.
Measure voltage between lower solenoid tan/grn wire terminal and ground.
Voltage must be approximately 12 VDC.
Open lower solenoid ground circuit. Check continuity between lower solenoid blk wire terminal and ground. Continuity must
be indicated.
Faulty lower solenoid. Test solenoid. (See “Solenoid Test” on page 4-63.)
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