Mec 3072ES - Page 53

"3072ES / 3772ES / 3772ES HD" Service & Parts Manual October 2008
Page 2-15
Check Momentary Button Switch
• Disconnect wires.
• Connect one probe of ohm meter each terminal.
• With the button in the neutral (open) position there should
be no reading.
• With the button pushed (closed) there should be a low
resistance.
Check Toggle Momentary Switch
• Disconnect wires.
• Connect first probe of ohm meter to common terminal.
Test top position
• Connect second probe to top normally open terminal.
• With the toggle in the neutral (open) position there should be no reading.
• With the toggle UP (closed) there should be a low resistance.
• With the toggle DOWN (closed) there should be no reading.
Test bottom position
• Move second probe to bottom normally open terminal.
• With the toggle in the neutral (open) position there should be no reading.
• With the toggle DOWN (closed) there should be a low resistance.
• With the toggle UP (closed) there should be no reading.
• Repeat for both rows of two-row switch.
Common
Normally Open
Normally Open
Normally Open
Normally Open
Common
Normally Open
Normally Open
Common
ART_2564
Common
Normally Open
Common
Normally Open
ART_2565
Common
Normally Open
Normally Open
Common
Normally Open
Normally Open
ART_2563