The wiring circuits in the vehicle are protected from short circuits by a combination of fuses, circuit breakers, and fusible thermal links. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of identical size and rating. If you ever have a problem on the road and don’t have a spare fuse, you can borrow one that has the same amperage. Just pick some feature of your vehicle that you can get along without – like the radio or cigarette lighter – and use its fuse, if it is the correct amperage. Replace it as soon as you can. The engine compartment fuse block is located in the engine compartment, on the drivers side of the vehicle.

Fuse Size Usage
1 Right Trailer Stop/Turn lamp
2 Electronic Suspension Control, Automatic Level Control Exhaust
3 Left trailer stop/turn lamp
4 Engine controls
5 Engine control module, throttle control
6 Trailer brake controller
7 Front washer
8 Oxygen sensor
9 Antilock brake system 2
10 Trailer back-up lamps
11 Driver side low-beam headlamp
12 Engine control module (battery)
13 Fuel injectors, ignition coils (right side)
14 Transmission control module (battery)
15 Vehicle back-up lamps
16 Passenger side low-beam headlamp
17 Air conditioning compressor
18 Oxygen sensors
19 Transmission controls (ignition)
20 Fuel pump
21 Fuel system control module
22 Not Used
23 Not Used
24 Fuel injectors, ignition coils (left side)
25 Trailer park lamps
26 Driver side park lamps
27 Passenger side park lamps
28 Fog lamps
29 Horn
30 Passenger side high-beam headlamp
31 Daytime running lights (DRL)
32 Driver side high-beam headlamp
33 Daytime running lights 2
34 Sunroof
35 Key ignition system, theft deterrent system
36 Windshield wiper
37 SEO B2 upfitter usage (battery)
38 Electric adjustable pedals
39 Climate controls (Battery)
40 Airbag system (Ignition)
41 Amplifier
42 Audio system
43 Miscellaneous (Ignition), Cruise control
44 Not used
45 Airbag system (Battery)
46 Instrument panel cluster
47 Power take-off
48 Auxiliary climate control (ignition)
49 Center high-mounted stoplamp
50 Rear defogger
51 Heated mirrors
52 SEO B1 Upfitter usage (battery)
53 Cigarette lighter, Auxiliary power outlet
54 SEO upfitter usage
55 Climate controls (Ignition)
56 Engine control module, secondary fuel pump (ignition)
57 Cooling Fan 1
58 Not Used
59 Heavy duty antilock brake system
60 Cooling fan 2
61 Antilock brake system 1
62 Starter
63 Stud 2 (Trailer brakes)
64 Left bussed electrical center 1
65 Not used
66 Heated windshield washer system
67 Transfer case
68 Stud 1 (trailer connector battery power)
69 Mid-bussed electrical center 1
70 Climate control blower
71 Not used
72 Left bussed electrical center 2
FAN HI Cooling fan high speed
FAN LO Cooling fan low speed
FAN CNTRL Cooling fan control
HDLP LO/HID Low-beam headlamp
FOG LAMP Front fog lamps
A/C CMPRSR Air conditioning compressor
STRTR Starter
PWR/TRN Powertrain
FUEL PMP Fuel Pump
PRK LAMP Parking lamps
REAR DEFOG Rear defogger
RUN/CRNK Switched power