2004 MAZDA MODEL B2300 TRUCK brake

TRAILER TOWING
Your vehicle may tow a class I, II or III trailer provided the maximum
trailer weight is less than or equal to the maximum trailer weight listed
for your engine and rear axle ratio on the following charts.
Your vehicle's load capacity is designated by weight, not by volume, so
you cannot necessarily use all available space when loading a vehicle.
Towing a trailer places an additional load on your vehicle's engine,
transmission, axle, brakes, tires and suspension. Inspect these
components carefully after any towing operation.
4x2 w/manual transmission
Engine Rear axle
ratioMaximum
GCWR - kg
(lbs.)Maximum
trailer
weight - kg
(lbs.)Maximum
frontal area
of trailer -
m
2(ft2)
Regular Cab
2.3L All 2,177 (4,800) 717 (1,580) Equal to
frontal area
of vehicle
3.0L 3.73 2,722 (6,000) 1,207 (2,660) 4.64 (50)
3.0L Dual
Sport4.10 2,722 (6,000) 1,143 (2,520) 4.64 (50)
Cab Plus/Cab Plus 4
2.3L All 2,177 (4,800) 644 (1,420) Equal to
frontal area
of vehicle
3.0L 3.73 2,722 (6,000) 1,125 (2,480) 4.64 (50)
3.0L Dual
Sport4.10 2,722 (6,000) 1,089 (2,400) 4.64 (50)
4.0L All 3,175 (7,000) 1,542 (3,400) 4.64 (50)
4.0L Dual
SportAll 3,175 (7,000) 1,506 (3,320) 4.64 (50)
For high altitude operation, reduce GCW by 2% per 300 meters (1,000
ft.) elevation.
For definition of terms used in this table seeVehicle Loadingearlier
in this chapter.
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128

Hitches
For towing trailers up to 907 kg (2,000 lb), use a weight carrying hitch
and ball which uniformly distributes the trailer tongue loads through the
underbody structure. Use a frame-mounted weight distributing hitch for
trailers over 907 kg (2,000 lb).
Do not install a single or multi-clamp type bumper hitch, or a hitch
which attaches to the axle. Underbody mounted hitches are acceptable if
they are installed properly. Follow the towing instructions of a reputable
rental agency.
Whenever a trailer hitch and hardware are removed, make sure all
mounting holes in the underbody are properly sealed to prevent noxious
gases or water from entering.
Safety chains
Always connect the trailer's safety chains to the frame or hook retainers
of the vehicle hitch. To connect the trailer's safety chains, cross the
chains under the trailer tongue and allow slack for turning corners.
If you use a rental trailer, follow the instructions that the rental agency
gives to you.
Do not attach safety chains to the bumper.
Trailer brakes
Electric brakes and manual, automatic or surge-type trailer brakes are
safe if installed properly and adjusted to the manufacturer's
specifications. The trailer brakes must meet local and Federal
regulations.
WARNING: Do not connect a trailer's hydraulic brake system
directly to your vehicle's brake system. Your vehicle may not
have enough braking power and your chances of having a
collision greatly increase.
The braking system of the tow vehicle is rated for operation at the
GVWR not GCWR.
Trailer lamps
Trailer lamps are required on most towed vehicles. Make sure all running
lights, brake lights, turn signals and hazard lights are working. See your
dealer or trailer rental agency for proper instructions and equipment for
hooking up trailer lamps.
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132

Using a step bumper
The optional step bumper is equipped with an integral hitch and requires
only a ball with a 19 mm (3/4 inch) shank diameter. The bumper has a
907 kg (2,000 lb.) trailer weight and 91 kg (200 lb.) tongue weight
capability.
The rated capacities (as shown in this guide) for trailer towing with the
factory bumper are only valid when the trailer hitch ball is installed
directly into the ball hole in the bumper. Addition of bracketry to either
lower the ball hitch position or extend the ball hitch rearward will
significantly increase the loads on the bumper and its attachments. This
can result in the failure of the bumper or the bumper attachments. Use
of any type of hitch extensions should be considered abuse.
Trailer tow connector
The trailer tow connector is located
under the rear bumper, on the
driver's side of the vehicle.
Refer to the following chart for information regarding the
factory-equipped trailer tow connector:
Trailer tow connector
Color Function Comment
1. Dark Green Trailer right-hand
turn signalCircuit activated when brake
pedal is depressed or when
ignition is on and right-hand
turn signal is applied.
2. Yellow Trailer left-hand turn
signalCircuit activated when brake
pedal is depressed or when
ignition is on and left-hand
turn signal is applied.
1
2
34
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133

Trailer tow connector
Color Function Comment
3. Tan/White Tail lamp Relay controlled circuit
activated when the park
lamps/headlamps are on.
4. White Ground Matching vehicle circuit
returns to battery's negative
ground.
Driving while you tow
When towing a trailer:
²Turn off the speed control. The speed control may shut off
automatically when you are towing on long, steep grades.
²Consult your local motor vehicle speed regulations for towing a trailer.
²To eliminate excessive shifting, use a lower gear. This will also assist
in transmission cooling. (For additional information, refer to the
Driving with a 5±speed automatic transmissionsection in this
chapter.)
²Under extreme conditions with large frontal trailers, high outside
temperatures and highway speeds, the coolant gauge may indicate
higher than normal coolant temperatures. If this occurs, reduce speed
until the coolant temperature returns to the normal range. Refer to
Engine coolant temperature gaugein theInstrument cluster
chapter.
²Anticipate stops and brake gradually.
²Do not exceed the GCWR rating or transmission damage may occur.
Servicing after towing
If you tow a trailer for long distances, your vehicle will require more
frequent service intervals. Refer to your service maintenance section for
more information.
Trailer towing tips
²Practice turning, stopping and backing up before starting on a trip to
get the feel of the vehicle trailer combination. When turning, make
wider turns so the trailer wheels will clear curbs and other obstacles.
²Allow more distance for stopping with a trailer attached.
²The trailer tongue weight should be 10±15% of the loaded trailer
weight.
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134

²After you have traveled 80 km (50 miles), thoroughly check your
hitch, electrical connections and trailer wheel lug nuts.
²To aid in engine/transmission cooling and A/C efficiency during hot
weather while stopped in traffic, place the gearshift lever in P (Park)
(automatic transmission) or N (Neutral) (manual transmissions).
²Vehicles with trailers should not be parked on a grade. If you must
park on a grade, place wheel chocks under the trailer's wheels.
Launching or retrieving a boat
Disconnect the wiring to the trailer before backing the trailer
into the water. Reconnect the wiring to the trailer after the
trailer is removed from the water.
When backing down a ramp during boat launching or retrieval:
²do not allow the static water level to rise above the bottom edge of
the rear bumper.
²do not allow waves to break higher than 15 cm (6 inches) above the
bottom edge of the rear bumper.
Exceeding these limits may allow water to enter vehicle components:
²causing internal damage to the components.
²affecting driveability, emissions and reliability.
Replace the rear axle lubricant any time the axle has been submerged in
water. Rear axle lubricant quantities are not to be checked or changed
unless a leak is suspected or repair required.
RECREATIONAL TOWING
Follow these guidelines if you have a need for recreational towing. An
example of recreational towing would be towing your vehicle behind a
motorhome. These guidelines are designed to ensure that your
transmission is not damaged.
4x2 equipped with a manual transmission:
Before you have your vehicle towed:
²Release the parking brake.
²Move the gearshift to the neutral position.
²Turn the key in the ignition to the OFF/UNLOCKED position.
²The maximum recommended speed is 88 km/h (55 mph).
²The maximum recommended distance is unlimited.
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135

²The vehicle must be towed in the forward position to ensure no
damage is done to the internal transfer case components.
In addition, it is recommended that you follow the instructions
provided by the aftermarket manufacturer of the towing
apparatus if one has been installed.
4x2 equipped with automatic transmission and 4x4 vehicles:
4x2 vehicles with automatic transmissions or 4x4 vehicles with an
electronic-shift transfer case and automatic transmission, follow these
guidelines for recreational towing:
²Release the parking brake.
²Turn the key in the ignition to the OFF/UNLOCKED position.
²Place the transmission in N (Neutral).
²Do not exceed a distance of 80 km (50 miles).
²Do not exceed 56 km/h (35 mph) vehicle speed.
²The vehicle must be towed in the forward position to ensure no
damage is done to the internal transfer case components.
If a distance of 80 km (50 miles) or a speed of 56 km/h (35 mph) must
be exceeded, you must disconnect the front (4x4 only) and rear
driveshafts. Mazda recommends the driveshafts be removed/installed only
by a qualified technician. See your local dealer for driveshaft
removal/installation.
Improper removal/installation of the driveshaft can cause
transmission fluid or transfer case fluid loss, damage to the
driveshaft and internal transmission and transfer case
components.
CAMPER BODIES
Your pickup is not recommended for slide±in camper bodies.
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
11 10A Passenger compartment fuse
panel (Logic power)
12 Ð Not used
13 15A Horn, Interior lamps
14 15A High beam headlamp, High beam
indicator (cluster)
15 Ð One-touch down relay
16 30A cartridge
fusePower windows
17 15A Turn signals/Hazards
18 Ð Not used
19 20A Center High-Mounted Stop Lamp
(CHMSL)/Stop lamps
20 10A Anti-lock Brake System (ABS)
module, Brake-shift interlock,
Speed control module, Back-up
lamps, Overdrive cancel switch,
Electronic flasher (turn/hazard)
21 5A Starter relay
22 5A Spare
23 30A Headlamps (low and high beam)
24 20A Radio
25 Ð Accessory relay
26 2A Brake pressure switch
27 10A Climate control blower relay/blend
doors, 4x4 module
28 15A 4x4 module B+
29 20A Cigar lighter, Diagnostic connector
(OBD II)
30 5A Power mirrors
31 20A Front park lamps, Rear park
lamps, License plate lamps
Roadside Emergencies
141

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
32 5A Brake switch (logic)
33 5A Instrument cluster
34 20A Power point
35 15A Power locks
Power distribution box
The power distribution box is
located in the engine compartment.
The power distribution box contains
high-current fuses that protect your
vehicle's main electrical systems
from overloads.
WARNING: Always disconnect the battery before servicing
fuses.
WARNING: To reduce risk of electrical shock, always replace
the cover to the Power Distribution Box before reconnecting
the battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and specificationschapter.