When a circuit goes out, the problem could be in either the primary or secondary underhood fuse blocks. These blocks use blade-type fuses.
Both underhood fuse blocks are located in the engine compartment, on the passenger side of the vehicle.
To access the fuse blocks, gently squeeze both sides of the cover to unlatch the tabs at the top. Then, unsnap both attachments at the bottom and remove the cover.
Notice: Spilling liquid on any electrical components on the vehicle may damage it. Always keep the covers on any electrical component.
Be sure to replace fuses with fuses of the same rating. Do not use fuses of higher amperage than those indicated on the fuse block.
Primary Underhood Fuse Block
Fuse | Usage |
|---|---|
RR DEFOG | Rear Defogger |
ENG 1 | Engine 1 |
ENG 3 | Engine 3 (L18/LF6/LF8) |
PCM-B | Powertrain Control Module |
TCM | Transmissions (LF8) |
ENG 4 | Engine 4 (LMM/LF6/LF8) |
ENG 2 | Engine 2 (L18/LMM) |
HTD FUEL | Heated Fuel (LMM) |
BLANK | Not Used |
BLANK | Not Used |
NOTE 3 | Fan Relay (LMM), Emissions (L18) |
A/C COMP | Air Conditioning Compressor |
ABS 1 | Antilock Brake System 1 |
ABS 2 | Antilock Brake System 2 |
ABS 3 | Antilock Brake System 3 |
ENGINE | Engine |
E/A PUMP | Electronic/Automatic Pump |
HORN | Horn |
NOTE 2 | Fuel (L18/LMM), Electronic Control Module (LF6) |
NOTE 4 | Electronic Control Module (LF6) |
STUD A | Spare |
STUD B | Spare |
Relay | Usage |
|---|---|
NOTE 1 | LMM/L18 Fuel Pump Relay |
IGN B RELAY | Ignition Relay |
STARTER RELAY | Starter Relay |
HORN RELAY | Horn Relay |
IGN A RELAY | Ignition Relay |
PTO/ECU* RELAY | Power Take-Off/Engine Control Unit (*Diesel 7.8L LF8) |
REVERSE RELAY | Reverse Relay |
FAN RELAY | Fan Relay (LMM) |
Secondary Underhood Fuse Block
Fuse | Usage |
|---|---|
IGN 1 | Ignition 1 |
IGN 4 | Ignition 4 |
IGN 3 | Ignition 3 |
BATT/HAZ | Battery/Hazard Warning Flashers |
HEADLAMP | Headlamps |
LIGHTING | Interior/Exterior Lamps |
HVAC | Climate Control System |
NOTE | C4/C5 Electric Brake, C6/C7/C8 Brake Lamps |
