2000 CADILLAC CATERA headlamp

6-31 High Intensity Discharge (HID) Lighting
(If Equipped)
CAUTION:
The low beam High Intensity Discharge lighting
system operates at a very high voltage. If you
try to service any of the system components,
you could be seriously injured. Have your dealer
or a qualified technician service them.
Halogen Bulbs
CAUTION:
Halogen bulbs have pressurized gas inside and
can burst if you drop or scratch the bulb. You or
others could be injured. Be sure to read and
follow the instructions on the bulb package.
Headlamps
1. With a screwdriver, unscrew the fastener on the
headlamp cover and then remove the cover to gain
access to the headlamps. Note that the inner bulb is
for the high
-beam headlamp and the outer bulb is for
the low
-beam headlamp.

6-34
Headlamp Aiming
If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment to the low beam
may be necessary if it is difficult to see lane markers
(for horizontal aim), or if oncoming drivers flash their
high beams at you (for vertical aim). If you believe your
headlamps need to be re
-aimed, we recommend that you
take your vehicle to the dealer for service. However, it is
possible for you to re
-aim your headlamps by following
the procedure in the service manual for your vehicle.
NOTICE:
To make sure your headlamps are aimed properly,
read all the instructions before beginning. Failure
to follow these instructions could cause damage to
headlamp parts.
Front Turn Signal Lamp
1. With a screwdriver, unscrew the fastener on the
headlamp cover and then remove it to access the turn
signal lamps.

6-35
2. On the outboard side of each low-beam headlamp,
you will find the turn signal bulbs. Turn the lamp
assembly counterclockwise to remove.3. Pull the bulb out to replace and then reassemble.

6-45
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels or wheel
bolts, replace them only with new GM original
equipment parts. This way, you will be sure to have
the right wheel and wheel bolts for your vehicle.
CAUTION:
Using the wrong replacement wheels and wheel
bolts on your vehicle can be dangerous. It could
affect the braking and handling of your vehicle,
make your tires lose air and make you lose control.
You could have a collision in which you or others
could be injured. Always use the correct wheel and
wheel bolts for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.
See ªChanging a Flat Tireº in the Index for
more information.
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is dangerous.
You can't know how it's been used or how far it's
been driven. It could fail suddenly and cause an
accident. If you have to replace a wheel, use a new
GM original equipment wheel.

6-56
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle unless
you check with your dealer first. Some electrical
equipment can damage your vehicle and the
damage wouldn't be covered by your warranty.
Some add
-on electrical equipment can keep other
components from working as they should.
Your vehicle has an air bag system. Before attempting
to add anything electrical to your vehicle, see ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamp Wiring
The headlamp wiring has several fuses which are
powered by a MaxiFuse
. An electrical overload will
cause the lamps to go on and off, or in some cases to
remain off. If this happens, have the headlamp wiring
checked right away.
Windshield Wiper Fuses
If the windshield wiper motor overheats due to heavy
snow or ice, the wipers will stop until the motor cools.
If the overload is caused by some electrical problem,
be sure to have it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows and other
power accessories. When the current load is too heavy,
the circuit breaker opens and closes, protecting the
circuit until the problem is fixed or goes away.

6-59
Fuse Usage
4 RH and LH Rear Seat Cushion Heater
Relay, Rear Sunshade Motor, Accessory
Power Outlet
5 Transmission Control Module
6 Radio Speaker Amplifier
7 RH and LH Rear Side Door Window
Regulator Motor
8 Headlamp Switch, Turn Signal
Switch, Horn Relay, CD Changer,
Multifunction Relay
9 Windshield Wiper Motor and Relay,
Windshield Wiper and Windshield
Washer Switch
10 Body Control Module (BCM), Heater
Water Auxiliary Pump, Fan Control
Relays, Auxiliary Water Pump Relay
11 Heater and A/C Control, RH and LH
Outside Rearview Mirrors
12 Hazard Warning Switch, Instrument
Cluster, Data Link Connector (DLC),
Stoplamp Switch, Gage Cluster, Heater
and A/C Control.Fuse Usage
13 Remote Control Outside Rearview Mirror
Switch, A/C Compressor Relay, Coolant
Fan Test Connector, A/C Load Switch
14 Cellular Telephone, RH and
LH Windshield Washer Nozzles,
Driver and Passenger Heated Seat Switch,
Heater and A/C Control, Heated Outside
Rearview Mirror and Rear Window
Defogger Relay
15 Rear Suspension Leveling Air Compressor
Relay, Instrument Cluster, Gage Cluster,
Cruise Control Switch, Headlamp Switch,
Multifunction Relay, Passenger and
Driver Heated Seat Relay, BCM, Sunroof
Actuator, Automatic Level Control Sensor,
RH and LH Heated Rear Seat Switch, RH
and LH Heated Rear Seat Cushion Relay,
Driver Seat Adjuster Memory Module,
LH Front Side Door Window Switch,
Inside Rearview Mirror
16 Cigarette Lighter (Front and Console)
17 Horn #1 and #2
18 Fuel Pump

6-60
Fuse Usage
19 Electronic Brake/Traction Control Module
20 Passenger and Driver Heated Seat Relay
21 Daytime Running Lamp (DRL) Relay,
LH High
-Beam Headlamp Relay
22 Headlamp Switch, LH
Low
-Beam Headlamp
23 LH Parking Lamp and Turn Signal
Lamps, LH Rear Sidemarker Lamp,
Multifunction Relay, LH Stoplamp
and Taillamp
24 Lifting Magnet, BCM, Gage Cluster
25 Sunroof Actuator
26 Headlamp Switch, RH and LH Front
Sidemarker Lamp, Middle Taillamp,
RH and LH Rear License Plate Lamp,
Radio, Automatic Transmission Control
Indicator, Heater and A/C ControlFuse Usage
27 Automatic Level Control Sensor, Rear
Suspension Leveling Air Compressor
and Relay
28 Door Lock Relay
29 Multifunction Relay, OnStar

System
30 RH Parking Lamp and Turn Signal Lamp,
RH Rear Sidemarker Lamp, RH
Stoplamp and Taillamp
31 RH Low
-Beam Headlamp Turn
Signal Switch
32 RH High
-Beam Headlamp Relay
33 Blower Controller, A/C Compressor Relay
34 Heated Rear Window Defogger Relay
35 Passenger Seat Adjuster Switch,
Driver Seat Adjuster Memory Module

6-61
Relay Box
The relay box is located on the lower part of the
instrument panel, to the right of the steering column.Relay Usage
I Daytime Running Lamps
II Automatic Level Control
III Rear Window Defogger,
Heated Mirrors
IV Hazard Warning Flashers
V High
-Beam Headlamps II (RH)
VI Horn
VII Parking Lamps and Turn
Signal Lamps
VIII Low
-Beam Headlamps
IX Not Used
X Not Used
XI High
-Beam Headlamps I (LH)