Circuit Protection - Fuses
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Circuit Protection - Fuses
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Special Tools
EL 39200
Digital Multimeter (DMM)
For equivalent regional tools, refer to Special Tools.
The fuse is the most common method of an automotive wiring circuit protection. Whenever there is an excessive amount of current flowing through a circuit the fusible element will melt and create an open or incomplete circuit. Fuses are a one time protection device and must be replaced each time the circuit is overloaded. To determine if a fuse is open, remove the suspected fuse and examine if the element in the fuse is broken (2). If not broken (1), also check for continuity using a Digital Multimeter (DMM) or a continuity tester. If the element is broken or continuity is suspect, replace the fuse with one of equal current rating.
Fuse Types
Current Rating Amperes
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Color
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Auto Fuses, Mini Fuses
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2
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Gray
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3
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Violet
|
5
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Tan
|
7.5
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Tan
|
10
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Red
|
15
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Blue
|
20
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Yellow
|
25
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White or Natural
|
30
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Green
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Maxi Fuses
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20
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Yellow
|
30
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Light Green
|
40
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Orange or Amber
|
60
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Blue
|
50
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Red
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J-Case Fuses
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20
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Blue
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30
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Pink
|
40
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Green
|
50
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Red
|
60
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Yellow
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