63
Electrical Cont.
Causes of a Blown Fuse
• Wire damaged including but not limited to: pinched, cut apart, melted, frayed, worn insulation (Figure-8).
• Components gone bad, causing electrical shortage or excessive amp draw.
• Overworking electrical system, causing excessive amp draw.
• Corrosion caused by excessive moisture.
• Wire pulled out of terminal (Figure-9).
• Loose wire connections (Figure-10).
Identifying a Bad Relay or Sensor
Unlike fuses, there is no visible way to check if a relay or sensor is bad. It also requires extensive electrical knowl-
edge and use of a multimeter.
Identifying a Blown Fuse
In the event an electrical component on the Mudd-Ox is no longer working, it may be the result of a blown fuse
or bad relay. Locate the specific fuse controlling the component that is non-operational. On most occasions, it is
possible to simply remove the fuse and identify if it is blown. On the inside of a fuse is a small metal strand (F in
Figure-11). If it is broken and/or the fuse is discolored, it is blown (Figure-12). If the strand appears whole, it may
not be blown, or the strand is broken in an area not visible to the human eye. Further testing requires extensive
electrical knowledge and use of a multimeter.
Figure-8
Frayed
Figure-9
Pulled out of terminal
Figure-10
Loose Connection
Figure-11
Good Fuse
Figure-12
Blown Fuse
F
F
FF
