2003 CHEVROLET BLAZER fuses

Trailer Wiring Harness
The light-duty trailer wiring is a six-wire harness
assembly. The optional heavy-duty trailer wiring is an
eight-wire harness assembly. The harnesses are stored
under the vehicle, along the passenger-side frame
crossmember on two-door vehicles or on the driver's
side corner frame rear crossmember on four-door
vehicles. The heavy-duty trailer wiring is fused in the
engine compartment fuse block. See
Fuses and Circuit
Breakers on page 5-85. Both harnesses have no
connector and should be wired by a quali®ed electrical
technician. The technician can use the following
color code chart when connecting the wiring harness to
your trailer.
·Dark Blue: Use for electric trailer brakes or auxiliary
wiring (eight-wire harness only).
·Red: Use for battery charging; it connects to the
starter solenoid (eight-wire harness only).
·Light Green: Back-up lamps.
·Brown: Taillamps and parking lamps.
·Yellow: Driver's side stoplamp and turn signal.
·Dark Green: Passenger's side stoplamp and turn
signal.
·White: Ground wire.
·Light Blue: Auxiliary stoplamp.
Securely attach the harness to the trailer, then tape or
strap it to your vehicle's frame rail. Be sure you
leave it loose enough so the wiring doesn't bend or
break, but not so loose that it drags on the ground. Store
the harness in its original place. Wrap the harness
together and tie it neatly so it won't be damaged.
4-65

If a Tire Goes Flat........................................5-62
Changing a Flat Tire.....................................5-63
Compact Spare Tire......................................5-75
Spare Tire...................................................5-76
Appearance Care............................................5-76
Cleaning the Inside of Your Vehicle.................5-77
Care of Safety Belts......................................5-78
Weatherstrips...............................................5-79
Cleaning the Outside of Your Vehicle..............5-79
Sheet Metal Damage.....................................5-81
Finish Damage.............................................5-81
Underbody Maintenance................................5-81
Chemical Paint Spotting.................................5-82
Vehicle Care/Appearance Materials..................5-82Vehicle Identi®cation......................................5-83
Vehicle Identi®cation Number (VIN).................5-83
Service Parts Identi®cation Label.....................5-84
Electrical System............................................5-84
Add-On Electrical Equipment..........................5-84
Headlamps..................................................5-84
Windshield Wiper Fuses................................5-85
Power Windows and Other Power Options.......5-85
Fuses and Circuit Breakers............................5-85
Capacities and Speci®cations..........................5-91
Normal Maintenance Replacement Parts..........5-92
Section 5 Service and Appearance Care
5-2

Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow or ice, the wiper will stop until the motor cools.
If the overload is caused by some electrical problem, be
sure to get it ®xed.
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 ®xed or goes away.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses and circuit
breakers. This greatly reduces the chance of ®res
caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical
size and rating.
If you ever have a problem on the road and don't have
a spare fuse, you can borrow one that has the same
amperage. Just pick some feature of your vehicle
that you can get along withoutÐ like the radio or
cigarette lighterÐand use its fuse, if it is the correct
amperage. Replace it as soon as you can.
5-85

Instrument Panel Fuse Block
The instrument panel fuse
block is located at the end
of the instrument panel
on the driver's side of the
vehicle.
Remove the cover by turning the fastener
counterclockwise. Extra fuses and the fuse extractor are
provided in the cover. To reinstall the fuse panel
cover, push in and turn the fastener clockwise.Fuse Usage
A Not Used
B Not Used
1 Not Used
2 Cigarette Lighter, Data Link
Connector
3 Cruise Control Module and Switch,
Body Control Module, Heated Seats
5-86

Driving On Grades..........................................4-62
Driving on Off-Road Hills.................................4-19
Driving on Snow or Ice....................................4-38
Driving Through Deep Standing Water...............4-32
Driving Through Flowing Water.........................4-32
Driving Uphill..................................................4-20
Driving with a Trailer.......................................4-60
Driving..........................................................4-28
At Night.....................................................4-28
City...........................................................4-33
Defensive..................................................... 4-3
Drunken....................................................... 4-4
Environment................................................. 4-3
Freeway.....................................................4-34
Hill and Mountain Roads..............................4-36
In Rain and on Wet Roads...........................4-30
Winter........................................................4-38
E
Electrical System............................................5-84
Add-On Equipment......................................5-84
Fuses and Circuit Breakers...........................5-85
Headlamps.................................................5-84
Power Windows and Other Power Options......5-85
Windshield Wiper Fuses...............................5-85
Electronic Transfer Case..................................2-29
Emergency Release for Opening Tailgate...........2-15Emissions Inspection and Maintenance
Programs...................................................3-32
Engine Compartment Fuse Block......................5-88
Engine Coolant Level Check.............................6-26
Engine Oil Additives........................................5-14
Engine Oil Level Check...................................6-26
Engine..........................................................5-15
Air Cleaner/Filter.........................................5-15
Battery.......................................................5-40
Check and Service Engine Soon Light............3-30
Compartment Overview................................5-10
Coolant Heater............................................2-22
Coolant Temperature Gage...........................3-29
Coolant......................................................5-22
Cooling System Inspection............................6-31
Exhaust.....................................................2-39
Fan Noise..................................................5-34
Oil .............................................................5-11
Overheating................................................5-25
Starting......................................................2-21
Entry Lighting.................................................3-14
Environmental Concerns..................................4-17
Erasing HomeLink
žButtons..............................2-47
Exit Lighting...................................................3-14
Express Down Window....................................2-12
Extender, Safety Belt.......................................1-31
Exterior Lamps...............................................3-11
5

F
Filter.............................................................5-15
Engine Air Cleaner......................................5-15
Finding a PTY Station.....................3-44, 3-51, 3-61
Finding a Station....................3-39, 3-41, 3-49, 3-58
Finish Care....................................................5-79
Finish Damage...............................................5-81
Five-Speed....................................................2-27
Fixed Mast Antenna........................................3-70
Flash-to-Pass Feature....................................... 3-6
Flat Tire, Changing.........................................5-63
Flat Tire........................................................5-62
Fluid.............................................................5-17
Automatic Transmission................................5-17
Manual Transmission....................................5-20
Power Steering...........................................5-35
Windshield Washer......................................5-36
FM ...............................................................3-69
Fog Lamps....................................................3-13
Following Distance..........................................4-61
Four Door Models...........................1-27, 1-29, 1-51
Four-Wheel Drive....................................2-28, 5-45
Front Axle......................................................5-46
Front Map Lamps...........................................3-14
Front Reading Lamps......................................3-14
Front Storage Area.........................................2-55
Fuel............................................................... 5-4
Additives...................................................... 5-5
California Fuel.............................................. 5-5Fuel (cont.)
Filling a Portable Fuel Container..................... 5-8
Filling Your Tank........................................... 5-6
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-35
Gasoline Octane........................................... 5-4
Gasoline Speci®cations.................................. 5-5
Low Warning Light.......................................3-36
System Inspection.......................................6-31
Fuses...........................................................5-85
Fuses and Circuit Breakers...........................5-85
Windshield Wiper.........................................5-85
G
Gage............................................................3-35
Check Gages Warning Light..........................3-35
Engine Coolant Temperature.........................3-29
Fuel..........................................................3-35
Oil Pressure...............................................3-33
Speedometer..............................................3-24
Tachometer.................................................3-24
Voltmeter Gage...........................................3-27
Garage Door Opener.......................................2-44
Garment Hooks..............................................2-56
Gasoline......................................................... 5-4
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Gate Ajar Light...............................................3-35
6

W
Warning Lights, Gages and Indicators................3-21
Warnings......................................................... 3-3
Hazard Warning Flashers............................... 3-3
Other Warning Devices.................................. 3-4
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washing Your Vehicle......................................5-79
Weatherstrip Lubrication...................................6-27
Weight of the Trailer Tongue.............................4-58
Weight of the Trailer........................................4-56
What Kind of Engine Oil to Use........................5-13
What to Add..................................................5-38
What to Do with Used Oil................................5-15
What to Use..................5-23, 5-35, 5-36, 5-45, 5-47
Wheels and Tires............................................5-91
Wheels..........................................................5-60
Alignment and Tire Balance..........................5-60
Replacement...............................................5-60
When to Add Engine Oil..................................5-12
When to Change Engine Oil.............................5-14
When to Check and Change Lubricant.......5-45, 5-46
When to Check and Change............................5-17
When to Check and What to Use.....................5-21
When to Check Power Steering Fluid................5-35
When to Check......................................5-20, 5-56
When to Inspect the Engine Air
Cleaner/Filter..............................................5-16When You Are Ready to Leave After
Parking on a Hill.........................................4-64
Where to Put the Restraint...............................1-41
Why Safety Belts Work....................................1-10
Window Lockout.............................................2-12
Windows.......................................................2-11
Power........................................................2-12
Rear Window..............................................2-13
Swing-Out Windows.....................................2-13
Windshield Washer Fluid Level Check................6-26
Windshield Washer.........................................5-36
Fluid..........................................................5-36
Windshield Wiper............................................5-52
Blade Replacement......................................5-52
Fuses........................................................5-85
Windshield Wipers............................................ 3-6
Winter Driving................................................4-38
Wiper Blade Check.........................................6-27
Y
Your Driving, the Road, and Your Vehicle............. 4-2
Your Vehicle and the Environment....................... 6-2
16