Jacobsen AR3, Техническое руководство по ремонту

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ELECTRICAL
4181384 First Edition 4-59
4
Symptom: Multi-function gauge does not display fuel level.
Symptom: Hour meter does not log hours.
Work Lights Circuit
Symptom: Hour meter does not log hours.
Probable Cause Remedy
Faulty fuel level sensor. Disconnect the multi-function gauge connector.
With the fuel level sensor still installed in the machine, measure the resistance between
the fuel level sensor terminals.
If the resistance measured is not in the range of 4 to 80 ohms, bench test the sensor.
(See “Fuel Level Sender Test” on page 4-71.)
Faulty fuel level input circuit. Check continuity between multi-function gauge terminal 1 and fuel level sensor blk/wht
wire terminal.
Continuity must be indicated.
Open fuel level sensor ground circuit. Check continuity between fuel level sensor blk wire terminal and ground.
Continuity must be indicated.
Faulty multi-function gauge Substitute the multi-function gauge with a known good multi-function gauge
Probable Cause Remedy
Faulty alternator light. Check light bulb. The multi-function gauge hour meter enable input is activated through
the filament of the light bulb.
Faulty alternator light switched power
circuit. With the key switch in the run position, measure voltage between alternator light grn wire
terminal and ground. Voltage must be approximately 12 VDC.
Faulty hour meter enable input circuit. Check continuity between alternator light brn/yel wire terminal and multi-function gauge
terminal 7. Continuity must be indicated.
Faulty multi-function gauge. Substitute the multi-function gauge with a known good multi-function gauge.
Probable Cause Remedy
Open fuse 10A fuse F3. Test fuse. (See “Fuse Test” on page 4-61.)
Faulty work lights switch. Test switch. (See “Rocker Switch Test” on page 4-66.)
Faulty work lights. Check light bulbs.
Faulty work lights switched power circuit. With the key switch in the run position, measure voltage between work lights switch
terminal 2 and ground. Voltage must be approximately 12 VDC.
Faulty work lights circuit. Turn the key switch to the run position.
With the light switch in the on position, measure voltage between the right work light
blu/wht wire terminal and ground.
Measure voltage between the left work light blu/wht wire terminal and ground.
Voltage must be approximately 12 VDC.
Open work lights ground circuit. Check continuity between right work light blk wire terminal and ground.
Check continuity between left work light blk wire terminal and ground.
Continuity must be indicated.