Circuit
BreakersUsage
REAR DEFOG Rear Window Defogger
POWER
SEATSPower Seats
Blank Not Used
Fuses Usage
PARK LOCK Ignition Key Solenoid
Blank Not Used
Blank Not Used
PCM, BCM,
U/H RELAYIgnition Signal: Hot in Run and Start,
Powertrain Control Module, Body
Control Module, Underhood Relay
RADIO PREM.
SOUNDRemote Radio Premium Sound
POWER
MIRRORSPower Mirrors
Blank Not Used
PANEL
DIMMINGPanel Dimming
Fuses Usage
Blank Not Used
IGN 0,
CLUSTER,
PCM, BCMIgnition Signal: Hot in Run, Unlock
and Start, Cluster, Powertrain
Control Module, Body Control
Module
Blank Not Used
Blank Not Used
Blank Not Used
INADV POWER
BUSInterior Lamps
DOOR LOCKS Door Locks
TRAP ALERT Trap Alert™
TAIL LAMPS,
LIC LAMPSTaillamps, License Lamps
RADIO Radio
HEATED
MIRRORNot Used
CRUISE Cruise Control
Blank Not Used
5-88
2003 - Regal OM
Fuses Usage
CLUSTER Instrument Panel Cluster
CIGAR LTRCigarette Lighter, Auxiliary Power
Connection (Power Drop)
STOP LAMPS Stoplamps
ONSTAR OnStar
®
FRT PARK LPS Front Parking Lamps
POWER DROPAuxiliary Power Connection (Power
Drop): Hot in ACC and Run
CRANK
SIGNAL, BCM,
CLUSTERCrank Signal, Body Control Module,
Cluster, Powertrain Control Module
HVACIgnition Signal, Heating Ventilation
Air Conditioning Control Head
BTSI PARK
LOCKShifter Lock Solenoid
AIR BAG Air Bag
BCM PWR Body Control Module
HAZARD Hazard Flashers
LH HEATED
SEATDriver’s Heated Seat
Fuses Usage
Blank Not Used
BCM ACCIgnition Signal: Hot in ACC and Run,
Body Control Module
Blank Not Used
LOW BLOWER Low Blower
ABS Anti-Lock Brakes
TURN
SIGNALS,
CORN LPSTurn Signals, Cornering Lamps
RADIO, HVAC,
RFA,
CLUSTERRadio, Heating Ventilation Air
Conditioning Head, Remote Keyless
Entry, Cluster
HIGH BLOWER High Blower
RH HEATED
SEATPassenger’s Heated Seat
STRG WHL
CONTAudio Steering Wheel Controls
WIPER Windshield Wipers
5-89
2003 - Regal OM
Underhood Fuse Block
Some fuses and relays are located in the underhood
fuse block on the passenger’s side of the vehicle in the
engine compartment. SeeEngine Compartment
Overview on page 5-10or more information on location.
Fuses Usage
1 Anti-Lock Brake System
2 Starter Solenoid
3Power Seats, Rear Window
Defogger Heated Seats
4High Blower, Hazard Flasher,
Stoplamps, Power Mirror, Door
Locks
5Ignition Switch, BTSI, Stoplamps,
Anti-Lock Brake System, Turn
Signals, Cluster, Air Bag, Daytime
Running Lamps Module
6 Cooling Fan
7Retained Accessory Power, Keyless
Entry, Data Link, Heating Ventilation
Air Conditioning Head, Cluster,
Radio, Auxiliary Power (Power
Drop), Cigarette Lighter
8Ignition Switch, Wipers, Radio,
Steering Wheel Controls, Body
Control Module, Auxiliary Power
(Power Drop), Power Windows,
Sunroof, Heating Ventilation Air
Conditioning Controls, Daytime
Running Lamps, Rear Window
Defogger Relay
5-90
2003 - Regal OM
At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced.
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag
system does not need regular maintenance.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace
blade inserts that appear worn or damaged or that
streak or miss areas of the windshield. Also see
“Windshield Wiper and Wiper Blades”underCleaning
the Outside of Your Vehicle on page 5-80.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. SeePart D: Recommended Fluids and
Lubricants on page 6-16.
Automatic Transaxle Check
Check the transaxle uid level; add if needed. See
Automatic Transaxle Fluid on page 5-20.A uid loss
may indicate a problem. Check the system and repair if
needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
speci ed in Part D.
Body Lubrication Service
Lubricate all hinges and latches, including those for the
body doors, hood, secondary latch, pivots, spring
anchor, release pawl, rear compartment, glove box door,
console door and any folding seat hardware. Part D
tells you what to use. More frequent lubrication may be
required when exposed to a corrosive environment.
6-11
2003 - Regal OM
Starter Switch Check
{CAUTION:
When you are doing this check, the vehicle
could move suddenly. If it does, you or others
could be injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-24if
necessary.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The starter
should work only in PARK (P) or NEUTRAL (N).
If the starter works in any other position, your
vehicle needs service.
Automatic Transaxle Shift Lock Control
System Check
{CAUTION:
When you are doing this check, the vehicle
could move suddenly. If it does, you or others
could be injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake. SeeParking Brake
on page 2-24if necessary.
Be ready to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off, turn the key to the RUN
position, but don’t start the engine. Without applying
the regular brake, try to move the shift lever out
of PARK (P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle needs service.
6-12
2003 - Regal OM
Ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
The key should turn to LOCK only when the
shift lever is in PARK (P).
The key should come out only in LOCK.
Parking Brake and Automatic Transaxle
Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
To check the parking brake’s holding ability: With
the engine running and transaxle in NEUTRAL (N),
slowly remove foot pressure from the regular
brake pedal. Do this until the vehicle is held by the
parking brake only.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-13
2003 - Regal OM