Fuses
R HDLP Fuse
Location: Underhood junction block
Type: 10A Minifuse
Feeds: Circuit 140A and 140B
If the following system is operating normally, the fuse is most likely good:
| • | Right high beam |
| • | Right low beam |
If the fuse is blown, determine the cause of the blown fuse and repair.
Replace the fuse as needed.
HAZARD Fuse
Location: Underhood junction block
Type: 10A Minifuse
Feeds: Circuit 1040A
If the following system is operating normally, the fuse is most likely good:
Hazard lamps
If the fuse is blown, determine the cause of the blown fuse and repair.
Replace the fuse as needed.
L HDLP Fuse
Location: Underhood junction block
Type: 10A Minifuse
Feeds: Circuits 40A and 40B
If the following system is operating normally, the fuse is most likely good:
| • | Left high beam |
| • | Left low beam |
If the fuse is blown, determine the cause of the blown fuse and repair.
Replace the fuse as needed.
Grounds
Before checking the ground circuit from the faulty component all the way to the ground stud, check the circuit from the splice pack to ground by testing some of the other subsystems grounded by the same splice pack. If the other subsystems function properly, it is most likely that the path from the splice pack to ground is good, or at least one of the paths is good with redundantly grounded splice packs.
I/P Splice Pack #1
Location: Taped to harness behind I/P cluster
The systems grounded by I/P Splice Pack #1 are grounded redundantly with I/P Splice Pack #2 at ground point location D, the I/P chassis ground. If one of the following systems is operating normally the ground circuit is most likely good.
| • | I/P dimmer |
| • | Cruise control |
| • | Headlamp switch |
| • | Cigar lighter element |
Check for OPENS/SHORTS.
Repair as needed.
I/P Splice Pack #2
Location: Taped to harness behind I/P cluster
The systems grounded by I/P Splice Pack #2 are grounded redundantly with I/P Splice Pack #1 at ground point location C, the chassis ground. If one of the following systems is operating normally the ground circuit is most likely good.
| • | Fuel lever sensor |
| • | Park brake switch |
| • | Wiper motor |
| • | Radio |
Check for OPENS/SHORTS.
Repair as needed.
Components (SC1/SL/SW)
Headlamp Switch
Refer to Lever Combination Switch (LCS) for testing.
Repair/replace as needed.
Park Brake Switch
Check the BRAKE telltale. It should light with the park brake ON. It should not be lit with the park brake OFF, under normal operating conditions.
Check for park brake switch resistance.
Switch Resistance: Open when the park brake is OFF. Less than one ohm when the park brake is ON.
DRL Relay
The Lock, Unlock and DRL relays are interchangeable only with each other.
Substitute another relay to see if the problem is fixed.
Repair/replace as needed.
Headlamp Bulbs
Visually inspect the high and low beam bulbs. Check resistance through the bulb.
Check for OPENS/SHORTS.
Repair/replace as needed.
Instrument Panel Cluster and DRL Logic
The DRL Logic is incorporated into the speedometer gage and is not separately replaceable.
With the key in the RUN position the following readings should appear when taking measurements at the pins of the instrument cluster harness connector, instrument cluster disconnected.
