Circuit Protection - Fuses
Special Tools
EL - 39200B
Digital Multimeter (DMM)
For equivalent regional tools, refer to Special Tools
.
 Courtesy of GENERAL MOTORS COMPANY
|
- Good fuse
- Bad fuse
NOTE:
All GM dealers must use genuine GM fuses on the vehicles they service. You should also encourage the use of GM fuses to your customers to assure they are getting the proper electrical system protection.
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.
Mini Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 2 |
Gray |
| 3 |
Violet |
| 5 |
Tan |
| 7.5 |
Brown |
| 10 |
Red |
| 15 |
Blue |
| 20 |
Yellow |
| 25 |
Natural |
| 30 |
Green |
Low Profile Mini Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 2 |
Gray |
| 3 |
Violet |
| 4 |
Pink |
| 5 |
Tan |
| 7.5 |
Brown |
| 10 |
Red |
| 15 |
Blue |
| 20 |
Yellow |
| 25 |
Natural |
| 30 |
Green |
Micro 2 Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 5 |
Tan |
| 7.5 |
Brown |
| 10 |
Red |
| 15 |
Blue |
| 20 |
Yellow |
| 25 |
Natural/White |
| 30 |
Green |
Micro 3 Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 5 |
Tan |
| 7.5 |
Brown |
| 10 |
Red |
| 15 |
Blue |
Maxi Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 20 |
Yellow |
| 25 |
Gray |
| 30 |
Green |
| 40 |
Amber |
| 50 |
Red |
| 60 |
Blue |
J-Case Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 20 |
Light Blue |
| 25 |
Natural |
| 30 |
Pink |
| 40 |
Green |
| 50 |
Red |
| 60 |
Yellow |
Low Profile J-Case Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 20 |
Light Blue |
| 25 |
Natural |
| 30 |
Pink |
| 40 |
Green |
| 50 |
Red |
| 60 |
Yellow |
M-Case Unslotted Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 20 |
Light Blue |
| 25 |
Natural |
| 30 |
Pink |
| 40 |
Green |
| 50 |
Red |
| 60 |
Yellow |
M-Case Slotted Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 20 |
Light Blue |
| 25 |
Natural |
| 30 |
Pink |
| 40 |
Green |
| 50 |
Red |
| 60 |
Yellow |
Midi Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 30 |
Black |
| 40 |
Black |
| 50 |
Black |
| 60 |
Black |
| 70 |
Black |
| 80 |
Black |
| 100 |
Black |
| 125 |
Black |
| 150 |
Black |
| 175 |
Black |
| 200 |
Black |
Mega Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 40 |
Black |
| 60 |
Black |
| 80 |
Black |
| 100 |
Black |
| 125 |
Black |
| 150 |
Black |
| 175 |
Black |
| 200 |
Black |
| 225 |
Black |
| 250 |
Black |
| 300 |
Black |
| 350 |
Black |
| 400 |
Black |
| 450 |
Black |
| 500 |
Black |
Single Z-Case Fuses
 Courtesy of GENERAL MOTORS COMPANY
|
| Current Rating Amperes |
Color |
| 125 |
Black |
| 150 |
Black |
| 175 |
Black |
| 200 |
Black |
| 225 |
Black |
| 250 |
Black |
| 300 |
Black |
| 350 |
Black |
| 400 |
Black |
| 500 |
Black |
| 600 |
Black |