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's 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.
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 Defog |
ENG 1 | Engine 1 |
BLANK | Not Used |
PCM-B | Powertrain Control Module |
BLANK | Not Used |
ENG 4 | Engine 4 |
ENG 2 | Engine 2 |
HTD FUEL | Heated Fuel |
BLANK | Not Used |
BLANK | Not Used |
02A | Emissions |
A/C COMP | Air Conditioning Compressor |
ABS 1 | Anti-lock Brake System 1 |
ABS 2 | Anti-lock Brake System 2 |
ABS 3 | Anti-lock Brake System 3 |
ENGINE | Engine |
E/A PUMP | Electronic/Automatic Pump |
HORN | Horn |
NOTE 2 | Powertrain Control Valve |
BLANK | Not Used |
STUD A | Spare |
STUD B | Spare |
Relay | Usage |
|---|---|
NOTE 1 | Powertrain Control Valve |
IGN B | Ignition |
STARTER | Starter |
HORN | Horn |
IGN A | Ignition |
PTO/ECU* | Power Take-Off/Engine Control Unit *Diesel 7.8L |
REVERSE | Reverse |
NEUTRAL START | Neutral Start (LG4 Allison Automatic Transmission Series 3000/3500) |
Secondary Underhood Fuse Block
Fuse | Usage |
|---|---|
IGN 1 | Not Used |
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 | Brake Lamps |
