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COMPONENT TESTING
PRECAUTIONS TO BE OBSERVED WHILE DIAGNOSING
PROBLEM COMPONENTS
Disconnect electric power from the dishwasher.
Voltage checks should be made by inserting meter probes beside the wires in the connector blocks with the electric power source on
and the connector block plugged in.
Resistance checks should be made on components with the electric power off and the connector blocks disconnected.
COMPONENT SCHEMATIC TESTING PROCEDURE RESULTS
Motor Start Relay
Drive Motor
Thermal Fuse
Heater Element
Fill Valve
Overfill Switch
1. Disconnect the wire connectors and
remove relay from unit.
2. Set VOM meter on the Rx1 scale.
3. Set the relay upright.
4. Measure resistance between blue
and violet contacts.
5. Turn relay upside-down.
6. Measure resistance between blue
and violet contacts.
1. Disconnect the motor wiring harness
plug from the motor connector.
2. Set VOM meter on the Rx1 scale.
3. Connect one probe to the white/violet
connector.
4. Connect the other probe to the blue/
white connector.
5. Connect the meter probe to the yellow
connector.
6. Connect the probe to the grey
connector.
1. Disconnect wires connectors from the
thermal fuse terminals.
2. Set VOM meter to read Rx1 scale.
3. Measure resistance between thermal
fuse terminals.
1. Disconnect the wire connectors from
the heater element terminals.
2. Set VOM meter to read Rx1 scale.
3. Measure resistance between heater
element terminals.
1. Disconnect the wiring harness plug
from the fill valve connector.
2. Set VOM meter to read Rx1 scale.
3. Measure resistance between the
terminals of the fill valve.
1. Disconnect the wires connectors from
the overfill switch terminals.
2. Set VOM meter to read Rx1 scale.
3. Measure resistance between switch
terminals.
4. Block the float in the UP (full) position
and measure resistance again.
1. Relay upright - meter should read
º (infinity.)
2. Relay upside-down - meter should
read less than two (2)Ω.
1. Violet to blue - meter should read
2.0 - 3.4Ω.
2. Violet to Yellow - meter should
read 4.2 - 7.0Ω.
3. Violet to Gray - meter should
read 4.2 - 7.0Ω.
1. Meter should read 0Ω.
1. Meter should read 25 - 35Ω.
1. Meter should read approximately
700Ω.
1. Float DOWN - meter should read
0Ω.
2. Float UP - meter should read
º (infinity).