Electrical
9
Circuit failures
There are three types of failures that can occur in an electrical circuit:
1.
Shorts
2.
Opens
3.
Increased resistance
Shorts
A short is when electricity takes a path that it was not designed to take bypassing a component in the circuit.
A common example of a short is the wire that chafed through. The bare copper will short the circuit when it
touches a ground source.
Opens
An open is when current can not complete its path back to the power source.
A common example of this is a blown fuse.
Increased resistance
Increased resistance is as the name implies, an increase in resistance.
Arguably the most common electrical failure, and the hardest to find, is when there is a loose connection or cor-
rosion. It is not an open because there is some current that can get through, but the increase in resistance is enough
to affect the circuit
Tools
•
Digital volt ohm meter
•
Wiring or a schematic diagram.
Equipment that may be useful:
•
Fused jumper wires.
•
Hand tools to gain access to components.
•
Flash light.
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
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