1999 CADILLAC CATERA headlamp

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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 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.

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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.
Center High-Mounted Stoplamp (CHMSL)
The CHMSL is equipped with high-durability
illumination. If a bulb problem does occur, see your
dealer for assistance.

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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.
Tire Chains
NOTICE:
Use tire chains only where legal and only when
you must. Use only SAE Class ªSº type chains
that are the proper size for your tires. Install
them on the rear tires and tighten them as tightly
as possible with the ends securely fastened. Drive
slowly and follow the chain manufacturer's
instructions. If you can hear the chains
contacting your vehicle, stop and retighten them.
If the contact continues, slow down until it stops.
Driving too fast or spinning the wheels with
chains on will damage your vehicle.

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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.

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Fuse Usage
4 RH and LH Rear Seat Cushion Heater
Relay, Rear Sunshade Motor
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.
13 Remote Control Outside Rearview Mirror
Switch, A/C Compressor Relay, Coolant
Fan Test Connector, A/C Load SwitchFuse Usage
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
19 Electronic Brake/Traction Control
Module
20 Passenger and Driver Heated Seat Relay
21 Daytime Running Lamp (DRL) Relay,
LH High
-Beam Headlamp Relay

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Fuse Usage
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 Control
27 Automatic Level Control Sensor, Rear
Suspension Leveling Air Compressor
and RelayFuse Usage
28 Door Lock Relay, OnStar

Connector
29 Multifunction Relay
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

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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)

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Fuse/Relay Usage
6 Fan Control Relay (K87)
7 Fan Control Relay (K26)
8 Fuse 50
9 Fan Control Relay (K28)
10 Engine Controls Power Relay (K43)
12 Fuse 40
15 Fuse 52
16 Connector C110
17 Coolant Fan Test Connector
Fan Control
18 Fuse 42 (A), Fuse 49 (B)
19 Fan Control Relay (K52)
20 Fuel Pump Relay (K44)
29 Fuse 43Replacement Bulbs
Application Bulb Number
Composite Headlamps
Inner High Beam 90512338. . . . . . . . . . . . . . . . . . .
Outer Low Beam 90512338. . . . . . . . . . . . . . . . . . .
Front Turn Signal Lamp 90487485. . . . . . . . . . . . . . .
Rear Turn Signal Lamp and Taillamp 90002521. . . .
Capacities and Specifications
The following approximate capacities are given in
English and metric conversions. Please refer to
ªRecommended Fluids and Lubricantsº in the
Maintenance Schedule booklet for more information.
Transmission 7.0 quarts (6.6 L). . . . . . . . . . . . . . . . .
Engine Crankcase
Oil Change With Filter 6.0 quarts (5.75 L). . . . . . .
Engine Cooling System 10.57 quarts (10.0 L). . . . . .
Fuel Tank 16.0 gallons (60.56 L). . . . . . . . . . . . . . . . .
R
-134a Refrigerant 2.09 lbs. (0.95 kg). . . . . . . . . . . .
NOTE: All capacities are approximate. When adding, be
sure to fill to the approximate level, as recommended in
this manual. Recheck fluid level after filling.