1990 HONDA PRELUDE wiring

ALB (Anti Lock Brakes) help to maintain the road holding and
tractability of your car during severe braking, and under slippery road conditions. The ALB system prevents the wheels from locking(thus reducing the chance of skidding) to ensure controllable
deceleration. When sudden braking might otherwise lock one or more wheels, the ALB system temporarily reduces the braking
pressure to the wheel or wheels about to lock to ensure continued
braking efficiency.
When the ALB is regulating the braking pressure, the brake pedal pulsates slightly to make the driver aware that the system is
compensating for critical braking conditions. The pulsating brake pedal can be an indication of hazardous road condition, and to
remind you to take extra care.
Don't mix different diameter tires; it will confuse the ALB
computer which monitors the road speed of each wheel. For
example, if one or more tires are larger than the others, the computer will think they are rolling more slowly (as if they are
about to lock up) and reduce brake pressure to those wheels.On loose or uneven surfaces (gravel, ruts etc.) where all four
wheels loss traction intermittently, the ALB system may require
a longer stopping distance than an equivalent car with a conventional braking system.
The ALB system cannot make up for extreme road conditions or driver misjudgement, It is still the driver's responsibility to drive
at a suitable speed and provide a margin of safety for the road,
weather and traffic conditions at hand.

CAUTION:

Be careful not to damage the wiring or the speed sensors at the
back of each wheel when removing mud or snow from the wheel
housings.
NOTE:
You may hear a sound like a small motor running, coming from the engine while driving or after the ALB is applied. This indicates theALB pump is in service and the system is working properly.
Ant
i
Lock Brake (Si with ALB)
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Towing a Trailer (cont'd)

Hitches

Use only a hitch recommended by your Honda dealer. The hitch

should be bolted securely to the car and installed by a qualified

technician. Do not use a hitch designed for temporary installation
and never use one that attaches only to the bumper.
Trailer Brakes and safety chains
The Honda Automobile Division recommends that trailers equippedwith brakes, should conform to any applicable federal and stateregulations, When using a trailer equipped with electric brakes, a
trailer brake controller that connects to the car's electrical system is recommended. Installing a brake controller that connects to the car's
brake hydraulic system could result in brake fluid contamination or
leaks, A safety chain must always be used between the car and the
trailer. Leave sufficient slack in the chain so that it does not bind in
sharp turns. The chain should cross under the trailer tongue to prevent the tongue from dropping to the ground.

Tires
Make sure your car's are properly inflated. Adjust tire pressure

to the recommended tire pressure indicated on the label attached to
the edge of the driver's door.The trailer tires should be of the proper size, load rating and inflated to the pressure recommended
by the trailer manufacturer.
Trailer Lights
Trailer light must comply with federal, state and local regulations. See your local recreation vehicle dealer or rental agency for the

correct type of lighting and wiring for your trailer, Check for correct
operation of the turn signals and stop lights each time you hitch up.

CAUTION:

Connections to your car's electrical system should be made by
your Honda dealer or a qualified electrician.Improper installation

may damage your vehicle's electrical system and cause a

malfunction of the lights.
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BRAKE FLUID RESERVOIR
Brake Fluid
Check the fluid level in the brake
fluid reservoir periodically; it should be between the MAX and MINmarks on the reservoir.If the level is near the MIN mark, add
fluid to raise it to the MAX mark. Do not overfill, Use only brake fluid
manufactured to DOT 3 or DOT 4
specifications (see reservoir cap)
from a seated container. Follow the manufacturer's instructions printed
on the can.
NOTE:
A low brake fluid level may be an indication of brake pad wear or of
brake fluid leakage. You should have your brakes checked if the
brake fluid level in the reservoir is low before refilling it.
CAUTION:
The arrow on the reservoir cap must be pointing forward after the cap is installed. Make sure the brake warning switch wiring doesn't
get caught between the cap and top edge of the reservoir.
ANTI LOCK
BRAKE FLUIDRESERVOIR
Anti Lock Brake Fluid (Si with ALB)
Check the fluid level in the ALB
reservoir periodically.

To check, drive the car for a few

minutes to equalize fluid pressure in
the system.
The level should be between the

MAX and MIN marks on the

reservoir. If the level is near the MIN
mark, add fluid to raise it to the
MAX mark.
Do not overfill. Use only brake fluid
manufactured to DOT 3 or DOT 4

specifications from a sealed

container.

Follow the manufacturer's

instructions printed on the can.
If the level is more than 10 mm (0.4 in) above the MAX mark, it may
indicate a malfunction of ALB system. Have an authorized Honda
dealer check the system as soon as possible.ProCarManuals.comMain Menu t s

Fuse Replacement (cont'd)

CAUTION:

A blown fuse may be just a symptom of some other problem. If a new fuse blows right away, the cause should be diagnosed and
corrected by a qualified Honda technician. Never replace a fuse with anything but another fuse of the same or lower rating. A
higher capacity fuse could cause damage and even start a fire.

The main fuse and some primary fuses are installed in the fuse box
on the right front fender in the engine compartment.
MAIN FUSE: (65A) SUNROOF FUSE: (35A)

If the circuits from the battery are ever overloaded (by a short in
the system drawing too much current for example) the main or a primary fuse will blow, preventing damage to the entire wiring
harness. If the main fuse blows, have a Honda dealer check the
system, repair the cause, and replace the fuse.

CAUTION:
The electrical system is protected by fuses that are designed to
fail and prevent damage to the wire harness. Always replaceblown fuses with the same rating as specified to prevent wiring
damage that can result in a possible fire.
For proper electrical contact after replacing these fuses, make
sure all screws are tight.ProCarManuals.comMain Menu t s