PART III
MI35.2012
18SEP95
5. WIRING: Refer to the appropriate electrical diagram for
wiring. Any wire or cable in the interior of the coach is to be
protected by fusing. All wire insulation should be rated 125
deg. Celsius (257 deg. F). Check applicable RVIA or other
code for detailed fusing and wiring information. Protecting
all wires and cables by fusing is desirable.
A #2 battery cable is supplied with most systems to connect
the pump to the battery or a battery junction post. If a different
cable is used it must be able to carry 200 amperes. If fusing
is required, use a 200 ampere fuse. The fuse should be placed
near the power source. Never connect a fuse directly to the
battery or place it in the battery box where an electrical spark
can cause the battery to explode. If power is taken directly
from the battery, the fuse should be at least 18" from the bat-
tery. A fuse kit is available from HWH Corporation.
Wiring harnesses supplied are usually adequate for most
installations. Harnesses are loomed at the factory. All con-
nections are plug in type except for pump relay which has
ring terminal connections and the power supply for the panel.
That is a field connection made by the installers.
If lengthening or shortening the harness is necessary it is
suggested that all connections be soldered and protected
with shrink tube. If other connection devices are used they
must be sealed to prevent deteriation of the connection.
Grease-filled weather resistant crimp on butt connectors are
available .
Packard Connectors are marked with A & B for wire
connections. This cannot be mixed up. Maintain correct wire
size and color when altering harnesses.
Master Warning Light/Buzzer connections are done by the
installer. Route all wiring away from all heat sources and pro-
tect against sharp edges. Check that jacks can pivot properly
without cutting or stretching wire harnesses or connections.
All grounding connections are supplied by HWH Corporation
and all grounding should be done at the supplied ground stud.
(Refer to PUMP RELAY AND PANEL CONNECTION DIAGRAM).
Coat all exposed electrical connections (battery cable ends,
pump solenoid terminals, grounds, etc.) with a protective
sealant such as Kraylon 1307.
7. THE MASTER WARNING LIGHT/BUZZER:
Warning Light should be used with all systems. A buzzer must
be used with systems using straight acting jacks.The Master
Warning Light should be mounted in the dash in a location
highly visible to the driver. This light will warn the driver if
any of the jacks are down when the ignition is turned to "ON".
Drill a 1/2" hole at the desired location. Be sure to check for
wires or other devices behind the surface before drilling. When
installing the light itself, make sure the ignition is in the "OFF"
position. With the ignition on +12 can be present at the warn-
ing light.
When using a buzzer, the +12 power should come from the
"ON" side of the ignition switch. The power for the panel should
come from the "ACC" side of the ignition switch. (Refer to the
MASTER LIGHT/BUZZER CONNECTION DIAGRAM). With
all wiring complete, the light plate may now be mounted.
A Master
COMPONENT INSTALLATION
NOTE:
THE BLUE PARK BRAKE WIRE IS A
SAFETY FEATURE AND MUST BE HOOKED UP ACCORD-
ING TO THE WIRING DIAGRAMS.
IMPORTANT:
6. PARK BRAKE CONTROL WIRE: The blue wire should
supply a ground signal or a +12 signal to the light panel only
when the park brake is applied. The blue wire is a single,
loomed wire in a separate plug at the light panel. The plug is
wired for a ground signal park brake switch.
GROUND SIGNAL PARK BRAKE: The existing wire to the
park brake switch is cut and routed to the connectors on the
end of the blue park brake wire harness. The connectors are
labeled and must be connected accordingly for the system to
function properly. Protect the connections with the shink tube
that is supplied. Other wire terminals may be used on the end
of the harness but DO NOT eliminate the diode arrangement.
(See FIGURE 8)
TO PARK BRAKE
LIGHT
PARK BRAKE
SWITCH
BLUE WIRE TO
LIGHT PANEL
DIODE ARRANGEMENT
FIGURE 8
FIGURE 9
GROUND SIGNAL
ARRANGEMENT
+12 SIGNAL
ARRANGEMENT
WHITE JUMPER
BLUE
PARK BRAKE
SWITCH WIRE
SHOWN WITH COVER REMOVED
+12 PARK BRAKE: Eliminate the diode arrangemnent at the
end of the blue park brake wire. (FIGURE 8) Splice the blue
wire directly onto the wire from the park brake switch. Solder-
ing with shrink tube is the preferred way to make this connec-
tion. A different park brake harness may be ordered for +12
park brake installations or the original plug can be rewired
to work corrrectly. (See FIGURE 9)
