Changing a Fuse
WARNING: Always replace a fuse with one that has the specified amperage rating. Using a fuse with a higher amperage rating can cause severe wire damage and could start a fire.
If electrical components in your vehicle are not working, a fuse may have blown. Blown fuses are identified by a broken wire within the fuse. Check the appropriate fuses before replacing any electrical components.
blown fuse |
Fuse Types
Fuses Types |
Callout | Fuse Type |
---|---|
A | Micro 2 |
B | Micro 3 |
C | Maxi |
D | Mini |
E | M Case |
F | J Case |
G | J Case Low Profile |
Standard Fuse Amperage Rating and Color
COLOR |
|||||
Fuse link cartridge |
Cartridge maxi fuses |
Maxi fuses |
Standard fuses |
Mini fuses |
Fuse rating |
- - |
- - |
- - |
Grey |
Grey |
2A |
- - |
- - |
- - |
Violet |
Violet |
3A |
- - |
- - |
- - |
Pink |
Pink |
4A |
- - |
- - |
- - |
Tan |
Tan |
5A |
- - |
- - |
- - |
Brown |
Brown |
7.5A |
- - |
- - |
- - |
Red |
Red |
10A |
- - |
- - |
- - |
Blue |
Blue |
15A |
Blue |
Blue |
Yellow |
Yellow |
Yellow |
20A |
Natural |
Natural |
- - |
Natural |
Natural |
25A |
Pink |
Pink |
Green |
Green |
Green |
30A |
Green |
Green |
Orange |
- - |
- - |
40A |
Red |
Red |
Red |
- - |
- - |
50A |
Yellow |
Yellow |
Blue |
- - |
- - |
60A |
Brown |
- - |
Tan |
- - |
- - |
70A |
Black |
Black |
Natural |
- - |
- - |
80A |
Fuses – Frequently Asked Questions
When do I need to check a fuse?
If electrical components in the vehicle are not working.
When do I need to replace a fuse?
If a fuse has blown.
How do I identify a blown fuse?
You can identify a blown fuse by a broken wire within the fuse. Power Distribution Box
Engine Compartment Fuse Panel Diagram |
1 20A Upfitter switches (AUX 2 and AUX 4)/Trailer
12V socket pin
2 30A Power seat (driver)
3 30A Power seat (passenger)
4 15A Windshield washer relay, Washer pump motor
5 5A Brake warning switch (hydraulic brake vehicles only)
6 20A Upfitter switches (AUX 1 and AUX 3)
7 15A Brake pressure switches, ABS event relay
8 20A DEF (Urea) line heaters (diesel engine only)
9 20A Ignition switch, Starter cutoff
10 15A Air tank moisture removal valve
11 30A Electric trailer brake
12 20A Passenger compartment fuse box 5 and 21
13 15A Instrument cluster/Gateway module
14 20A Nitrogen oxide sensor (diesel engine only)
15 — Not used
16 5A Bendix® Air ABS
17 — Not used
18 10A Fuel transfer pump
19 15A Powertrain control module power 1 (gasoline engine only)
20 10A Powertrain control module power 2 (gasoline engine only)
21 20A Powertrain control module power 3 (gasoline engine only)
22 20A Powertrain control module power 4 (gasoline engine only)
23 — Not used
24 10A Powertrain control module keep-alive power (gasoline engine only)
101 30A Bendix Air ABS relay (Air brake vehicles only) Hydraulic brakes module (hydraulic brake vehicles only)
102 20A Ignition switch
103 20A Ignition switch, Passenger compartment fuse box fuses 19, 29 and 30
104 20A Power point
105 20A Power door lock switches
106 30A Main light switch, Multi-function switch
107 50A Passenger compartment fuse box fuses 1, 2, 3, 4, 12, 13, 14 and 15
108 40A Fuel heater (diesel engine only) 20A Fuel pump module (gasoline engine only)
109 40A Power window
110 30A Windshield wiper
111 30A Body builder relay, Parking lamps
112 40A Blower motor
113 30A Heated seats, Air-Ride seat
114 — Not used
115 20A Ignition switch, Passenger compartment fuse box fuses 8, 9, 10 and 11
116 30A Left/Right turn relays, Back up lamp relay
117 20A Stop lamps
118 60A Hydraulic brake vehicles (trailer tow package only)
601 60A Trailer socket
602 60A Air brake trailer tow fuse block
201 — Windshield washer relay
202 — Wiper high/low relay
203 — Wiper run/park relay
204 — Windshield wiper relay
205 — Body builder relay, right turn
206 — Body builder relay, left turn
207 — ABS event relay (hydraulic brake vehicles only)
208 — Body builder relay, back up lamps relay
103 20A Ignition switch, Passenger compartment fuse box fuses 19, 29 and 30
104 20A Power point
105 20A Power door lock switches
106 30A Main light switch, Multi-function switch
107 50A Passenger compartment fuse box fuses 1, 2, 3, 4, 12, 13, 14 and 15
108 40A Fuel heater (diesel engine only) 20A Fuel pump module (gasoline engine only)
109 40A Power window
110 30A Windshield wiper
111 30A Body builder relay, Parking lamps
112 40A Blower motor
113 30A Heated seats, Air-Ride seat
114 — Not used
115 20A Ignition switch, Passenger compartment fuse box fuses 8, 9, 10 and 11
116 30A Left/Right turn relays, Back up lamp relay
117 20A Stop lamps
118 60A Hydraulic brake vehicles (trailer tow package only)
601 60A Trailer socket
602 60A Air brake trailer tow fuse block
201 — Windshield washer relay
202 — Wiper high/low relay
203 — Wiper run/park relay
204 — Windshield wiper relay
205 — Body builder relay, right turn
206 — Body builder relay, left turn
207 — ABS event relay (hydraulic brake vehicles only)
208 — Body builder relay, back up lamps relay
209 — Auxiliary stop lamp relay
301 — Fuel heater/Fuel transfer pump relay (diesel engine only) ; — Fuel pump module (gasoline engine only)
302 — Body builder relay, parking lamps relay
303 — Blower motor relay
304 — DEF (Urea) line heaters relay (diesel engine only) ; — Powertrain control module power VPWR1 (gasoline engine only)
301 — Fuel heater/Fuel transfer pump relay (diesel engine only) ; — Fuel pump module (gasoline engine only)
302 — Body builder relay, parking lamps relay
303 — Blower motor relay
304 — DEF (Urea) line heaters relay (diesel engine only) ; — Powertrain control module power VPWR1 (gasoline engine only)
Individual Maxi Fuse Holder in Engine Compartment
Fuse/Relay Location ... Fuse Amp Rating ... Protected Circuits
9925 30A Hydraulic brakes pump motor 1
9925 30A Hydraulic brakes pump motor 1
WARNING: To reduce risk of electrical shock, always replace the cover to the power distribution box before reconnecting the battery or refilling fluid reservoirs.
The power distribution box is in the engine compartment. It has high-current fuses that protect your vehicle's main electrical systems from overloads.
If you disconnect and reconnect the battery, you will need to reset some features.
Passenger Compartment Fuse Panel
The fuse box is located behind the passenger airbag cover. You can
access it through the glove box.
Use the provided fuse puller tool to remove a fuse. It is on the fuse panel cover.
access it through the glove box.
Use the provided fuse puller tool to remove a fuse. It is on the fuse panel cover.
1 20A Horn
2 15A Flasher relay
3 20A Power point
4 10A Data Link Connector (DLC), Engine diagnostic connector, Parking brake warning
5 15A Run relay
6 — Not used
7 — Not used
8 5A Radio, GEM
9 5A Power window relay
10 15A Heated mirrors
11 5A Wiper and washer systems
12 10A Transmission shift selector
13 20A Radio/SYNC®, Power mirrors
14 10A Interior lamp relay
15 10A Interior lamp relay
16 15A High beams, Indicator
17 — Not used
18 5A Dimmer switch, Interior lighting
19 15A Engine control (diesel engine only)
20 5A Starting system
21 10A DRL resistor
22 15A Air horn, Air suspension dump, Two-speed axle, Driver-controlled locking differential
23 10A Flasher relay
24 15A Hydraulic brakes relay, Fuel heater relay (diesel engine only), Air dryer
25 10A Blower motor relay coil
26 10A Right-hand low beam headlight
27 — Not used
28 10A Left-hand low beam headlight
29 10A Cluster, GEM
30 15A Allison electronic transmission
31 15A Mirror fold relay
Relay 1 — Interior lamps
Relay 2 — Not used
Relay 3 — Horn
Relay 4 — Not used
Relay 5 — Not used
Relay Center
The relay center is located along the passenger side A-pillar on the right
side of the footwell.
Relay Location ... Relay Description
R1 Spring applied hydraulic release warning chime module or PCM power VPWR 2, 3 and 4
R2 A/C compressor clutch
R3 Power windows
R4 Flasher (standard/LED)
R5 Upfitter relay 1
R6 Upfitter relay 2
R7 Headlights
R8 Cummins starter lockout
R9 Upfitter relay 3
R10 Starter
R11 DCU (diesel engine only)
R12 Two–speed axle/Differential lock
R13 Door lock
R14 Air tank moisture valve
R15 DRL #1
R16 Heated mirrors
R17 Spare
R18 Upfitter relay 4
R19 Shift interlock/EPRNDL display
R20 Selective Catalyst Reduction (SCR) system (NOx) (diesel engine only)
R21 Run
R22 Door unlock
R23 ABS warning indicator
R24 DRL #2
R25 Park lights
R26 Spare
Trailer Tow Relays (If Equipped)
Trailer Tow Relays Diagram |
1 30A* Trailer tow ABS feed (non electric trailer brake vehicles only)
2 30A* Trailer tow park/marker lamps
3 30A* Trailer tow stop lamps
4 30A* Trailer tow turn/stop lamps (combined) Trailer tow turn lamps (separate)
5 — Not used
R1 — Trailer tow ABS relay (non electric trailer brake vehicles only)
R2 — Trailer tow marker lamp relay
R3 — Trailer tow stop lamp relay
R4 — Trailer tow tail lamp relay
R5 — Not used
R6 — Not used
R7 — Trailer tow left turn lamp relay
R8 — Trailer tow right turn lamp relay
*Maxi fuse
Inline Fuses
Your vehicle may have several inline fuses located in, or on, the battery cables located in the battery box (depending on application).
• All vehicles equipped with an Allison transmission have a 10 amp fuse located in the clean power cables located in the battery box.
• All vehicles have a 30 amp fuse located in the clean power cables located in the battery box.
• All vehicles equipped with hydraulic brakes have a 40 amp fuse located in the clean power cables located in the battery box. In addition, another 30 amp fuse is located in a fuse holder just above the power distribution center located in the vehicle’s engine compartment.
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