Textron Jacobsen AR-5 Technical/Repair Manual

4-46 4181383 First Edition
ELECTRICAL
4
Troubleshooting
Control Module
Symptom: Control module does not power up.
Park Brake Circuit
Symptom: Control module brake sw LED does not turn on.
Neutral Circuit
Symptom: Control module brake sw LED does not turn on.
Probable Cause Remedy
Open fuse 20A fuse F2. Test fuse. (See “Fuse Test” on page 4-57.)
Faulty control module unswitched power
circuit.
Measure voltage between control module terminal J3-5 and ground.
Voltage must be approximately 12 VDC.
Faulty control module switched power
circuit.
With the key switch in the run position, measure voltage between control module terminal
J3-2 and ground. Voltage must be approximately 12 VDC.
Open control module ground circuit. Check continuity between control module terminal J3-8 and ground. Continuity must be
indicated.
Faulty key switch Test key switch.
Faulty control module. Substitute the control module with a known good control module.
Probable Cause Remedy
Faulty wiring harness or park brake
proximity switch.
Disconnect park brake proximity switch connector from wiring harness. With a jumper
wire, connect the park brake switch connector Org/Pnk and Brn/Red wire terminals
together. With the key switch in the run position, check the control module brake sw
LED.
If the LED turns on, substitute the park brake proximity switch with a known good switch.
If the LED does not turn on, measure voltage between park brake proximity switch
Org/Pnk wire terminal and ground. Voltage must be approximately 12 VDC.
If the LED does not turn on, check continuity between park brake proximity switch
Brn/Red wire terminal and control module terminal J1-7. Continuity must be indicated.
Probable Cause Remedy
Faulty wiring harness or neutral proximity
switch.
Disconnect neutral proximity switch connector from wiring harness. With a jumper wire,
connect the neutral switch connector Org/Pnk and Brn/Wht wire terminals together.
With the key switch in the run position, check the control module brake sw LED.
If the LED turns on, substitute the neutral proximity switch with a known good switch.
If the LED does not turn on, measure voltage between neutral proximity switch Org/Pnk
wire terminal and ground. Voltage must be approximately 12 VDC.
If the LED does not turn on, check continuity between neutral proximity switch Brn/Wht
wire terminal and control module terminal J1-7. Continuity must be indicated.

Textron Jacobsen AR-5 Specifications

General

Brand	Textron
Model	Jacobsen AR-5
Category	Lawn Mower
Language	English